I have Dermestid beetles and they are BY FAR the easiest to use......Not quite as fast as boiling but YUCK!! What a pain.....Beetle will clean a deer skull in 2-10 days (it depends on how "hot" the colony is at the time...if you catch it just right it can clean a deer skull in 24 hours but that is unusually fast).........I will never go back to boiling......