Muc-Off X-3 Dirty Chain Machine Cleaning Kit. The X-3 Dirty Chain Machine is by far the easiest way to give your chain a good scrub. Included in the kit is a 75ml measure of Muc-Off Drivetrain Cleaner. This revolutionary little liquid can be either sprayed over the drivetrain or poured directly into the top reservoir of the machine which is then released by a control button. The abrasive cleaning teeth and rotating brush wheels which have 120 contact points cover all areas of the individual chain link for a deep and thorough clean. Finally the excess dirty fluid drops into a second lower reservoir so its kept away from the clean chain. No more recycled grime all over the chain. Muc-Off Drivetrain Cleaner is fully biodegradable and is safe to be disposed of down the drain if you previously used one of our bio chain lubes.