Heat (or cold) transfers fastest thru water- so I thaw rodents in cool water, then once they're thoroughly soft thru-out (they pass my finger-squish test, lol), then I immerse for a few minutes in very warm water. None of my snakes are as picky as most BPs are about temperature, so at that point (in your situation) I'd add some heat with a blow dryer (especially on the rat's head, where the snake will likely target) & be sure to offer very quickly. Or keep experimenting- many of us have slightly differing methods.![]()