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I'm trying to figure out a DIY #fog machine. Priorities are (in order): safety, safety, low cost.
I don't need a lot of #smoke really, because I intend to use this indoors in relatively small rooms.
I've done research and #Glycerine based liquid seems to be the best option - it can be made fully organically, it's safe for humans in any form. It's not going to break down during fogging so it won't become toxic. Glycol is a different story and I want to stay away from it. Idea so far: hairdryer.