I love low tech solutions to ongoing problems. For years I have used a heating pad for a place to set raising bread or incubating yogurt. The heating pads they now sell have an automatic off switch, so they just don't work that great as a warming pad for food. Here's a new solution-- a warming box, otherwise known as a cooler. A cooler is just an insulated box. If it has cold stuff in it it'll keep it cool; if it has warm stuff in it.... The pictures show a pot full of bread dough and a mason jar of very warm water. I put it in the bread dough and the hot water in the cooler, shut the lid and I've got the perfect warm spot for raising dough. I've also used this set up for making yogurt, it works perfectly.