When I bought my new dop pot, the heating element was very loose. I had to make sure that element was pressed tightly up against the bottom of the pot.
So if your was is not getting hot enough, maybe take it apart and double check that element.
Although maybe not highly recommended, I use a propane bottle torch on some minerals before applying my dop.. Not extreme heat, but hotter than what the dop pot offers. Never with agates, but many others.
I also use metal dops. I heat the ends with the torch as well before dipping in the wax.
Now all this extra heating does add to some discomfort to the fingers because the extra heat results in the wax having to be formed around the base of the dop and back of the stone by hand.
Not sure if any of that makes any sense, but it works for me.. I also use warm water when I decide to use a dop. Cooler water acts just like cooler air, and can make the wax brittle, and also shrink a bit resulting in it coming off the back of the stone. The warm water remedies this for me.
Rather than dish soap, I also use the torch for removing oil left from the saw.. Does not take a lot of heat, and again, do not use for agates, but a little heat from the torch you can actually see the oil burn off.
Don't flame me too bad about the torch use !
