After trying a wide variety of cleaning solutions, I have settled on simple solutions. Simple as in Simple Green.

Simple Green comes in two formulations - the green all-purpose cleaner and the purple heavy-duty cleaner.

I use the purple heavy duty full strength in my parts washer. It removes dirt and grease buildup simple and easy.

I keep a couple of spray bottles handy for cleaning around nuts and bolts prior to trying to loosen them.

I find it even does better as a powder solvent for cleaning guns than the old standby Hoppes #9.

Non-toxic, bio-degradable, and multi-purpose. A great cleaning agent to have around...