I recently used a new heated parts cleaner that used a fluid from CRC, that is "green". I was surprised how well it worked, and one of the nicest parts of using it, was that even though I wasn't wearing gloves, it removed caked on grease with little effort, and I could just wash the "stuff" off of my hands with warm water. It also didn't dry out my hands as so many of the solvent based cleaners do. The only fault that I could find with it was that every 15 minutes the pump would shut off automatically, and I had to reset it. I guess that they don't want the pump running unless it is being used. If it were not for the cost, I would buy one for my shop. A number of years ago, I was given one for free, since the heater failed, and the manufacturer replaced the entire unit to the customer. Had I known how well they work, I would have improvised some type of heater to get it working. I sold it on Craigslist, just to get it out of the shop. Live and learn.