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Suck Up the Dust As You Go
Most DIYers start cleaning the interior by shampooing the carpet. That's a mistake—you'll just get it dirty again as you clean the upper surfaces. Instead, try our car tricks and start at the top and work your way down. Vacuum the headliner, dash, console and door panels. Then clean all the glass, and dust the nooks and crannies. Sweep the dust out of the cracks with a detailing brush. Catch all that crud right away with your vacuum. Learn more about how to clean and restore your car's interior.
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Destink the Interior
To neutralize tobacco smoke, buy an aerosol can of Dakota Non-Smoke. Holding the can 12 to 14 in. away from fabrics, lightly spray the headliner (don't soak it), seats, door panels and carpet. Then turn the fan to high and switch the system to recirculate mode (“max. A/C” if you don't have that option). Find the intake opening by holding a tissue near the blower motor. Then spray the mist into the opening. Leave the windows closed for at least one hour. Your vehicle will smell like baby powder for a while, but that'll go away. You can also change your car's air filter once this is done. Plus: If you have a bad smell in your house, we'll show you how to fix it.
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Clean the Leather
This may sound extreme, but if you've got leather upholstery, buy a leather-cleaning kit and keep it in the vehicle (one brand is Leather Master Leather Care Kit with Ink Lifter). Because, if you clean the oops right away, you really increase your chances of a complete cleanup. If you wait, lipstick, ink and dye transfers from clothing (and plastic shopping bags) can set permanently in as little as 24 hours. Pretreat the leather with a conditioner before you start the stain removal process. Wipe the ink lifter directly on the pretreated leather and rub it in. Let it sit for 30 seconds, and wipe it with a clean cloth. Then apply leather cleaner and the leather protection cream.