To prevent build up of dirt and contaminates, which may cause permanent staining, periodic cleaning is highly suggested. The frequency of cleaning is dependent upon the environmental conditions the material is subjected to. For normal cleaning: Most stains can be easily cleaned using warm, soapy water and clear water rinses. Moderate scrubbing with a medium bristle brush will help loosen soiling materials from the depressions of embossed surfaces. For more stubborn stains, use Formula 409® commercially available cleaner in accordance with the manufacturer's instructions. Full strength rubbing alcohol or mineral spirits* may be tried cautiously as a last resort on very stubborn stain, if the above suggestions do not work. Indiscriminate use of any solvent, or solvent containing cleaner, can severely damage or discolor vinyl. Always follow with a clear water rinse after cleaning with solvents. Note: Detergents should never be used on a regular or repeated basis for normal cleaning. Morbern recommends repeated rinsing with clear water after any cleaning procedure. When opening a new container, please test the cleaner in an inconspicuous area as cleaning manufacturers may change formula without notice. Morbern cannot be responsible when unknown changes are made by the manufacturer of the cleaner to their formulations. *Caution: Exercise care as these solvents are flammable. Use only small quantities of solvents and keep clear of any sources of ignition. Wear protective gloves and ensure cleaning takes place in a well ventilated area.