We recommend using alcohol and a Q-tip to clean your tracks and Edgerider wheels. Cleaning regularly keeps the machine running smoothly over the tracks and prevents buildup on the wheels. The sensor wheels, however, have a rubber o-ring that can be negatively affected by alcohol, so alcohol should be used sparingly on those wheels. Your sensor wheels should not need to be cleaned often, but if you do notice a buildup, try water with a light soap to clean. If soapy water does not remove the oil, then you can try alcohol. If you notice that the o-rings are worn, distorted, or cracked, you will need to replace them. Replacement o-rings can be purchased from www.quilttech.com.