Let me repeat this, DO NOT USE HEATING WITH RUBBING ALCOHOL! Oh my god, yes! It's one of theses reviews! So anyways I have some stuff i need to clean in 91% isopropyl alcohol or IPA. I'd been using one of these cheap jewelry cleaners for stuff but the plastic wasn't acetone friendly, specially with the lid closed. Ask me how i know! Haha. Anyways i wanted something big enough to dip an og xbox motherboard into or other similar sized or larger than my jewelry one could do objects. This guy certainly fit the bill so I snagged one. Well one night I was playing around and had about 1.5 gallons of rubbing alcohol running a cycle on that xbox original board to get years of smoking off it for a recap. Roommate calls and needs me to bring her a work item, so I did... I left for all of 20 minutes, 20 MINUTES!!! I live in a 3 bedroom apartment. That thing boiled off over 2 quarts in that time and it was only 40c!!! (IPA boils at 82c) The smell of rubbing alcohol was still so strong that even with all the doors and windows open for 6 hours it still smelled like a hospital the next day. Good thing my apartment is all electric no pilot lights go boom! Anyways so yeah the IPA heats up well enough just from the ultrasonic emitters.Maybe I'll make a lid that allows me to recycle the alcohol after use by distillation and reclaim pure versus contaminated but filtered waste