IMHO to do a good job of cleaning your chain you need to take it off. Get a quick link and learn how to remove an old link and substitute a quick link. With that installed you can remove it and clean it easily at any time. Acetone is dangerous and gives no advantage over other chain cleaning solvents. Any bike shop will have some varieties. Take of the chain, put in a smallish container with solvent, shake, dump solvent, repeat. Repeat till the chain is completely clean. Let dry. Some folks recommend rinsing with water then allowing to dry. Whether you need this depends on whether there is any solvent left on the chain. Some leave residue some don't. For derailleurs and such, spray cans of solvent are hard to beat. You can clean the chain on the bike with things like the Park cleaning tools that attach to the chain. They work OK but never as well as removing the chain entirely.