Cleaning the Filter Minder ® Use a mild soap solution to clean the Filter Minder ®. Do not use petroleum based solvents or other chemicals, as they may attack the polycarbonate clear housing causing it to crack and craze. Gauge contact with brake fluid and ethylene glycol should be avoided. Engineered Products Co. 2940 Airport Blvd. Waterloo, IA 50703 Ph: (319) 234-0231 Fax: (319) 234-8922 info@filterminder.com