I use Isopropyl Alcohol (Rubbing Alcohol) to clean parts in general. There are 2 kinds of alcohol termed 'Rubbing Alcohol'. Isopropyl and Ethyl. I find Isopropyl easier on plastics and rubber. I use it to clean old rubber off the lexan bodies and it works perfect. If I clean tires I use the Ethyl as I found it works as a mild traction compound better than Isopropyl.