My Lil' Dipper sit at around 240º after it's been on awhile. Not adjustable. I've been waxing chains in that same crockpot for over 15,000 miles now. I've dumped wet chains, chains still drippinh with solvent, dirty chains, any chain-- right in the 240º wax. The most it ever caused was about 5 seconds of simmer-like bubbling. It's not a cauldron full of lava. It's just wax.
Oh, and 240º wax spatter from the pot usually cools before it even reaches the skin. I put the chains back on the bikes still hot, just by holding one end of the chain with a paper towel.
I stopped using wet lubes primarily because I do not like the mess. Also, you can use most any chain lube as a cutting lube for sawing or drilling. So I don't want to do that.
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