When I was having hands printed on the Stratasys Fortus at Innovation Accelerator I noticed the bottle of Stratasys solution that was near the wash station. I noted that the "special Stratasys solution" contained sodium hydroxide. This is the same caustic solution that we utilize for a cleaning solution when anodizing aluminum so I happen to have a few bottles of the necessary material. Jerry had given me a few parts that were still loaded with support so I decided to see if I could dissolve it with my sodium hydroxide and one of my ultrasonic cleaners in my studio. I am happy to report that this worked like a charm. The ultrasonic has a heater so it keeps the solution warm and the ultrasonic action seems to speed the process; just like when I clean investment from castings. The ultrasonic cleaner also has a stainless steel liner, so that should keep it from etching through the metal (as it would with an aluminum pan-ask me how I know this). I left the parts in the solution over night and came back to clean parts with no support. The parts just require a rinse after they are pulled out and then I scrub them just to remove traces of the solution. There were no remnants of support material left when the parts were pulled from the solution. I have been reading more on the topic and it appears that the solution should dissolve PLA also. I'll run some tests though and report my findings. Also, it might be nice to check out the cheap Harbor Freight ultrasonic cleaners to see how they hold up to the job.