Double boilers and I aren't friends. But then, the Instant Pot... It has this handy little button that says "Keep Warm" -- and it works for melting fat and beeswax WITHOUT the dreaded double boiler! I know I'll never make hard lotion bars without my Instant Pot again!
Instant Pot Hard Lotion Bars https://traditionalcookingschool.com/food-preparation/recipes/instant-pot-hard-lotion-bars/