James Engineering offers a wash cycle (wet option) for the systems. The wash cycle will run during the part cycle. The wash fluid runs through a 30 micron filter and eliminates all debris from the part. The James Engineering wash solution has a rust inhibitor preventing rust. It is coupled with a mild detergent to attack hobbing oils and other substances. The James Engineering solution is not hazardous. Please see our MSDS sheet for further questions and information. In most cases, customers elect to use their own solution. Often their solution is a soluble oil to guarantee rusting will not be an issue for parts that sit in a humid environment.