I have been looking for a solution for years. Perhaps somebody out there already has it. We need a way to deflux, and also clean boards that some back in for service. As it is now we just use flux off, or other such chemicals but it is rather wasteful. Years ago we could use vapor units but California no longer allows them. I have been trying to think of some contraption that would wash the boards, then I could distill the dirty solvent back out. Perhaps under vacuum to reuse the cleaner. Any thoughts? We still use RA flux in most of out products, and have for 34 years...