Plastic surfaces, especially those that are textured, can become dirty over time. Prevent tough buildup by cleaning the plastic often to remove even the slightest layer of dust, dirt, grease and other debris. Acetone is a strong chemical solvent that will remove contaminants from the surface. Acetone is especially useful in removing paint or adhesive stains. Always test the cleaning method on a small and inconspicuous area of your plastic surface, as acetone will degrade some types of plastic. Never use acetone on painted plastic, as acetone will remove varnish and paint.
Soak a clean cloth in acetone.
Rub the cloth over the surface of the plastic until it appears and feel clean or until you remove as much of the dirt and buildup as possible.
Dip a toothbrush into the acetone.
Brush the acetone-soaked toothbrush over the plastic surface until it is completely clean. Work the acetone into the crevices and into the textured surfaces of the plastic.
Rinse the plastic with clear water and dry it completely.