For cleaning and rejuvenating, Revolution No.3 Cleaner has been judged the absolute best. It is not only the most economical cleaner; it also provides spectacular results on old rubbers, giving them a new lease of life . Clean, environmentally safe and incredibly easy to use. Place 2-3 drops on the rubber and use your hand to clean until the surface is dry. Is there any risk in contacting your skin? On the contrary, testing has shown it to be a non-irritant. Try it once, and you are promised to become a new fan.