The chain doc comes complete with a can of muc off bio chain cleaner which can clean up to 35 bicycle chains per can making it ready for cleaning straight from the box it will bring your chain back to life in seconds 19 to be exact directions for use step 1 position bike upright or mount in a workshop stand shift chain to middle front chain ring and third smallest cassette for optimum chain tension step 2 hold the chain cleaning machine in your left hand with your thumb over the spra