The Morgan Blue Chain Cleaner is a very strong degreaser and cleaning product all in one. The Chain cleaner can be used for the chain, but the rest of the chain drive can be done as well.
Bring the Chain Cleaner on the chain, front and rear derailleur. Allow the cleaner to affect for about 5 minutes, then wash it off with some water and soap. The next thing you always have to do is lubricate your drive chain again.