UPDATED: April 2, 2023 |                     

So you have decided to leave your vehicle in your Florida garage for the summer while you spend time in the Indiana, Michigan, New York (or wherever home away from home is) to get away from Florida’s brutally hot and humid summers.

What happens if you get back to Florida in October, open up your car door, and see white mold all around your steering wheel, dashboard, and leather seats, and to make things worse…your car won’t start and you have flat spots on your tires? Did you as the homeowner do something wrong? Did your homewatch guy do something wrong? What could have been done to prevent such issues? Well, when conditions are right…mold can grow and can spread very quickly in your vehicle, and your vehicle battery can drain quicker than you may think. I’m not a car expert and I’m not a mold expert…but I’ve dealt with my fair share of the above mentioned situations over the past many years. That being said, I’d like to share some personal tips with you that could prove to be very beneficial.

If you are like most people, then you probably don’t have an air conditioned garage. If your garage is known to hold a lot of humidity in the air, then you need to get the humid stagnant air issue under control first.

• Consider purchasing a box fan from a Home Depot or Lowe’s and setting it sturdily in your garage. Also purchase a manually programmable timer to connect the fan to. A suggestion would be to set the timer so that the fan turns on every day between 12 PM and 5 PM. The fan turning on will circulate the air in your garage during the hottest or most humid time of the day. Some of my clients have installed a ceiling fan in their garage and simply let in run on low. It’s a great way to have continuous air circulation in your garage.
• You can also purchase a portable dehumidifier for your garage and program it to run when the relative humidity level gets over your desired setting. Make sure to run the dehumidifier hose so you have the end of the hose sticking out of the corner of your large garage door. That way the water can drain outside and not into your garage. 

• My company does not recommend the use of DampRid in unoccupied Florida homes, nor in vehicles.  However, there is one exceptionThe only time I suggest using DampRid in a vehicle is when the vehicle parked outside under a carport or in an under building open-garage without any direct sun.  In those situations, the humidity in a vehicle can rise very quickly.  Since the vehicle is parked outside, there isn’t muc
h else you can do, because you cannot control the environment surrounding your vehicle as you could if it were parked in a garage (with access to electricity to run an A/C unit, a fan, or a dehumidifier).  So, if you are going to use DampRid in your Florida stored vehicle, I suggest to use two of the large DampRid 4-pound tubs/buckets, and the buckets should be replaced with two new large buckets every 4 weeks (or sooner if needed).

Everyone has their own opinion on this…however, let me give you both scenarios.
• If you leave the windows opened about 4 to 6 inches, it will allow air to circulate throughout your vehicle, especially if you install the box fan (suggested above) in your garage.  Air circulating is healthy for your vehicle and doesn’t allow humid air to sit stagnant in your vehicle.  It also makes it a tad harder for potential mold spores to easily settle on your vehicle’s interior surfaces and spreadHere is the issue…If your garage has a roof leak and rain water (moisture) enters your garage, the uncirculated humid air (moisture) in your confined garage can settle in your vehicle and mold can start to grow and spread rather quickly if conditions are right.  The mold will start to feed on any organic material it can find in your vehicle.  It usually likes leather seats and it loves dead skin cells and skin oils.  That’s why steering wheels seem to get a lot of surface mold on them.  Also, leaving windows opened can give easy access for rodents such as mice and rats to chew through your under-dash wires and create nests inside your vehicle.
• If you decide that you want to close all the windows in your vehicle, then I also suggest closing all of the vents in your vehicle.  Make sure that you engage your air recirculation button before you turn off your vehicle.  This will close the air intake door-vent.  Keeping humid air from making its home inside your vehicle is key to helping keep your vehicle mold free!  If it were my vehicle and I had to choose between keeping the windows opened or closing them…I would choose to close them.  In speaking with other homewatch providers across Florida, the consensus is to close them.  The other added benefit from closing your windows, is that it will deter snakes, mice, and rats from making their home in your vehicle.

No one wants to come back to their Florida home, only to have a vehicle that won’t start. It gets really hot in your garage during the summer months. The heat along with your vehicle staying idle for long periods of time can cause your battery to drain or go flat. It will then require a jump-start or a charge, both of which can lower the lifespan of your battery. If left flat long enough your battery will need to be replaced. So how do you avoid having issues with your vehicle’s battery? Well, you have 3 options:

Option 1: You disconnect the battery. You may lose your dashboard and radio settings, but at least your battery won’t be drained from an unknown item somewhere within your vehicle’s electrical system. It can be burdensome to have to pull out the ratchet set each time to disconnect your battery. So what some of my clients have done is to have a battery disconnect switch (some call it a “kill switch”) connected to the battery’s negative terminal. That way all you have to do is turn the knob and it disconnects the battery. Then you simply turn the knob the other way and it connects your battery again. There are several different kinds of disconnect switches. You can ask your auto repair tech which one is best suited for your vehicle.

Option 2: You connect a vehicle battery maintainer to your battery. Please note that a battery charger and a battery maintainer are NOT the same. Do NOT connect a battery charger to your vehicle for long period of time…use a battery maintainer instead. A battery maintainer is a device that connects to both your negative and positive battery terminals and plugs into your garage electrical outlet. It’s essentially a trickle charger that helps a battery maintain a charge while sitting dormant. The trickle charge is enough to counteract self-discharge, but not so large that it threatens to overcharge your battery. By using a battery maintainer, you’ll be able to extend the life of your battery. When properly maintained, your battery can last for more than five years. However, without proper maintenance, your battery may fail in less than two years. You can get a decent battery maintainer at your local auto parts store for around $35 to $70 depending on the one you choose to purchase.  Make sure you know what kind of a battery you have (Standard, AGM, Lithium, Gel), so you can purchase the appropriate battery maintainer for your vehicle.

Option 3: Do nothing, leave your battery as is, and hope for the best. Typically someone will choose this option because 1) they do not want to disconnect their battery and lose all their dashboard and radio settings, 2) they have a new vehicle with a new battery and think nothing will happen, 3) they don’t want to take a chance that a malfunctioning battery maintainer could (although very rare) start a fire in the garage, and 4) their service technician at a local car dealership told them they don’t need one.

So you get back to your Florida home after being away for 6 months, you hop in your vehicle and head off to the store for some groceries. On the way to the store you feel this unnerving vibration that appears to be coming from your tires. You think, “Is my car safe to drive? Do I need to replace my tires?” Once you realize your tires have flat spots you start asking yourself, “What could I have done to prevent this?” If you look online, you’ll numerous blogs on what to do and what not to do. Essentially it comes down to where are you storing your vehicle and for how long. Flat spots occur on your vehicle’s tires when the weight of a vehicle presses down on the same section of immobile tire for long period of time, changing your tire’s circumference. It’s been suggested that tires nowadays can withstand flat spots much better than older tires due to technology and quality. Others suggest that it is not the case. Either way, here are some easy-to-do basic suggestions that could help minimize flat spots:
• Make sure the tire pressure in all 4 tires is properly filled to standard manufacturer’s recommendations and consider adding an additional 5 to 10 pounds of air pressure. Just make sure that when you drive your vehicle again, that you drop the air pressure back to manufacturer recommendations.
• Park each tire on a piece of thick carpeting. This is so your tires don’t come into direct contact with the hot or cold concrete.
• Have your homewatch company or neighbor back your vehicle out and back into your garage once or twice a month so that your tires are not sitting in the same spot for too long a period.
• Consider purchasing flat-free tire supports or tire storage ramps and parking your vehicle on them. They can cost anywhere from $60 to $300 depending on the kind you buy. I like the FlatStoppers brand. Once tires are set on FlatStoppers, they settle into the ramp’s concave depression, which helps support more of the tire. This disperses the weight of the vehicle more evenly onto the tire, helping to prevent any flat spotting. (www.FlatStoppers.com)

Many people ask, “Should I cover my vehicle when I leave my Florida home?” A big determining factor is whether you are storing your vehicle inside or outside.
Inside Storage: If you are storing your vehicle in your Florida garage, there really isn’t much of a need to place a car cover on it unless you want to protect it from dust and dirt. However, if you decide to place a car cover over it, it is imperative that you make sure your vehicle is COMPLETELY CLEAN AND DRY before putting on the car cover. If your vehicle is slightly wet prior to putting on the car cover, then you could trap moisture between the car cover and the vehicle. Which may cause some discolorations on your paint. It may even trap moisture around your vehicle that could instigate surface mold within your vehicle. If your vehicle is dirty prior to putting on the car cover, then you could risk scratching the paint as the cover moves along the surface of your vehicle.

Outside Storage: If you are storing your vehicle outside (say under a carport), then you once again need to make sure that your vehicle is COMPLETELY CLEAN AND DRY before putting on the car cover. The kind of cover will really matter in this situation. Make sure you buy a good quality breathable car cover that keeps moisture out. The car cover should be water proof (remember…nothing is ever 100% water proof when it comes to mother nature) and be securely attached to avoid heavy winds blowing it off or causing it to tear.

If the fuel in a vehicle will remain longer than 90 days, then consider adding a “fuel stabilizer” to your gas.  Prior to leaving your vehicle for the summer months, add the fuel stabilizer with a full tank of gas and let the engine run for a few minutes to circulate the fuel stabilizer through all system components.  The fuel stabilizer helps prevent condensation forming in the tank when temperatures change.  It helps prevent gasoline from oxidizing and it coats metal surfaces to prevent corrosion.
• Some quality storage fuel stabilizers can keep fuel fresh for extended periods of up to 12 to 24 months.
• Be sure to get the proper fuel stabilizer for the type of fuel you are putting in your vehicle.
• Remember that not all fuel stabilizers are created equal.
Always seek advice from your vehicle’s manufacturer prior to doing anything you are not certain of.

Does starting a stored vehicle and letting it run for 10 minutes or driving it up and down the block help charge the vehicle battery?  NO!  Please read on, and I’ll tell you why.
When it comes to vehicle storage and maintenance, everyone can have a different opinion.  Auto manufacturers (whom build and sell the vehicles) and auto-mechanics (whom service the vehicles) will often give contradicting information to the public.  As a consumer, you are trying to figure out what are proper procedures to ensure your vehicle is properly cared for.

In the past, many clients (that didn’t have a battery maintainer connected to their vehicle) have asked me to start up their vehicle during a homewatch inspection and let it run for a good 10 minutes, or take it for a quick drive up and down the block.  The purpose behind it was to “charge up the battery and get the fluids moving” in their stored vehicle.  Over time, I realized that those particular vehicles were the ones that needed to have their battery replaced.  Why?  I wanted to find out, so I did 2 things…

Tested vehicles with battery maintainers: Prior to disconnecting the vehicle battery maintainer, I would look on the battery maintainer display and make sure the display shows that the vehicle’s battery is charged and at a healthy storage level.  Then, I would disconnect the battery maintainer, start up the vehicle, and let it run for a good 10 minutes.  I then would turn the vehicle off and reconnect the vehicle battery maintainer.  After being connected, the vehicle battery maintainer display showed the vehicle’s battery level lower (worse off) than before I started it and let it run.  If the purpose of starting a stored vehicle is to charge the battery, then why is the battery drained after starting and running it?  Short answer: Every time you start a vehicle, the battery takes a hit and it needs to be charged up again.  So, the alternator needs to charge and replenish the battery.  The alternator works by turning mechanical energy into electrical energy.  Which is done when the vehicle is being driven.  If a stored vehicle keeps being started and it’s not driven, the battery in it will eventually die.

Contacted several auto manufacturers: I contacted several domestic and foreign (import) auto manufacturers, and they all essentially told me the same thing:
“It is not recommended to just start a stored vehicle and let it sit, because it will eventually deplete the battery’s life.”
Auto Manufacturers’ Solution: Disconnect the battery or leave a vehicle battery maintainer connected to it.  Disconnecting the battery is not always recommended for newer model high-end vehicles with all the computer chips and devices in them.
“It is not recommended to just drive a stored vehicle up and down the block, because it can also contribute to the depletion of the battery’s life.”
• Auto Manufacturers’ Solution: If you are going to drive it, it should be driven for at least 15 minutes over 35 mph to charge up the battery. Otherwise, just leave it properly connected to the battery maintainer.

• Wash your vehicle and have the interior of your vehicle cleaned out and vacuumed prior to leaving.
• Have Have your homewatch company to do a visual check of your garage to look for signs of ceiling leaks, water intrusion, and pest or rodent issues.
• Have your homewatch company do a visual check of your vehicle (flat tires, visible signs of mold, functioning battery maintainer, etc.).
• Have your homewatch company visit your home a minimum of every 2 weeks (twice per month). One visit per month is not recommended. A lot can happen in an unoccupied or vacant home or property in

If you enjoyed reading this blog and found it beneficial, please feel free to share it with others. – Carl

* Please note the information above are suggestions based on HWSE experiences. Each homeowner is encouraged to store their vehicle as they see fit, based on their own experiences.HWSE - Cartoon Character 2