You can try an inexpensive yogurt maker. They work at low heat. It can be trial and error but I've found that mine without the lid on it works well. I think mine was about $15. The brand of mine is Total Chef Yogurt Maker.
Thanks Andrea I surely give it a trial.
I use my Mol d"Art melting tank. Ihave a 6kg tank and find it hold the gun and 4-5 colours. I leave them overnight before I plan to use them and leave them in the tank while I'm working as well.
Some folks use a excalibur dehydrator. I've been eyeing reptile incubators lately!