I thaw in a cup of hot water (not scalding, but higher than lukewarm). Right before I'm about to feed I replace the water (which has now cooled) with fresh hot water to give the rodent a solid heat signature. I dab the wet rodent on a paper towel to remove excess water and then feed.

Some people report their BPs won't eat wet rodents. I guess I'm one of the lucky ones. I like that the wet rodent gives extra hydration to the BP.