Your Steering Wheel
Before going out for a drive, you might want to consider wiping down your steering wheel first. A recent study from CarRentals.com revealed that the average steering wheel harbors 629 colony-forming bacterial units per centimeter—four times the amount found on an average public toilet seat!
The solution? Give your wheel a wipe-down with an antibacterial cleanser, change your filters regularly, wipe down your vents, and vacuum your car often.