I saw this washer on craigslist, and since I had my eye out for one, it followed me home. This machine is somwhat complex, but works very well. It recyles its own solvent! just push a button and a vacuum pump sucks the old solvent down like an aircraft toilet! into a vessel where it is heated under a vacuum-the vapors are distilled and returned to a storage tank. The crud left behind is like old engine oil and is tapped off the side.