Regular vacuuming removes much of the dirt that can contribute to wear and tear of the fabric and carpet. Periodic cleaning of carpet and fabric removes dirt that is more imbedded and can minimize the likelihood of stains. To protect interior surfaces such as panels, clean with a suitable interior cleaner and apply a protectant to prevent damage from the sun's ultraviolet rays. Clean the leather periodically and apply a leather treatment to keep the leather conditioned for longest life, if your car has a leather interior. Spills and other mishaps should be cleaned up as soon as possible to reduce the possibility of stains. A great way of removing dust, pollen, and common allergens from interior surfaces is with shop cloths. These disposable cleaning cloths capture dirt rather than moving it around.
It is also good to avoid any loose articles from moving around within the interior, because they can interfere with operation of the brake, accelerator and clutch pedals and may even be dangerous when a sudden jar of the car takes place during an accident. Eliminate all needless items and locate those that must stay in a secure place like a compartment, cup holder, or other storage space.