I agree with
@gloopygloop that the HTHP bars don’t cure any faster. They do saponify faster, so they are safe to use almost immediately. But “safe” does not equal “ideal.”
I didn’t know this for the first few years that I soaped, and I always wondered why some bars felt different than others (not as drying), or didn’t get mushy in the shower. Curing was what made all the difference. Your soap will be so much nicer on your skin, and will last so much longer, after a proper cure.
I also hate using a crockpot bc it is too heavy to handle easily and too difficult to control the temp. Plus, a lot of soap gets overcooked and dried on the sides, and thus wasted bc you don’t want to incorporate those dried bits into your soap. Also, some people don’t have a crockpot and don’t need to spend on another item that is stored just for soap.
For HTHP, I prefer to heat on the stove, using a stainless pot with handles. Compared to a heavy crock, it is sooo much easier to pour from there into the mold, or into separate containers for mixing colors.
For her HTHP method, Ashley primarily uses the microwave to melt her oils, and adds no additional heat after that. I enjoy that for small batches, but my microwave is too small to fit the size of container needed for larger batches of HTHP. As noted, you need a container big enough to accommodate the possibility of a significant expansion. My expansions are fairly tame, but I don’t and won’t take chances by using a too-small container, just to get it into the microwave.
I suppose I could melt the oils for a large batch in the microwave, and then pour them into my preheated stainless pot for mixing. But part of my love for HTHP is the economy of dishes to wash, and the simplicity of fewer steps to take.
Lots of ways to skin the cat, as they say. Much of the fun comes from trying different things and finding what works for you.