the most common way to clean your nitro rc is with Denatured Alchohol. This cane be purchased at any hardware store, such as Lowes or Home depot for about 9.00 a gallon. Works great, and is the main ingredient in all the nitro spray cleaners sold at your LHS. If you live near a racetrack for 1/1 size cars, or know of a race car shop, u can also use methanol race fuel. this is only about 5.00 a gallon, and is basically the same thing.