Hi everyone! I am Lisa and I have been making soy candles for a while now. Had a weird thing happen to me today that has never happened before. I was heating my soy in the microwave in my 4 cup pyrex measuring glass, 4 minutes to be exact with about 24 ounces of wax, when all of a sudden my microwave and all the lights in the house dimmed! I looked at the microwave and my glass pyrex was ORANGE glowing on one side. I went to open the door to examine it, moved back as I saw my pyrex literally was melting a hole in the side.... the thing blew up and burst glass and hot wax everywhere! Scared me to death, and a very small piece of glass went down my throat. Think I am OK, will know later! HA! My dilema is...I bought a presto pot today and wondered....Can you leave your wax in it all of the time, over a period of several nights on warm???? Will it hurt to do this? I make a ton of candles as the schools are using them for fundraisers now and am just wondering how to go about this as I have never used one before! I love the amount of wax that it holds and like the idea of having a lot of wax ready to use! NEAT! Thanks so much!