I tried the bag method and did not like it. I would thaw them all (mix of rats and mice of different sizes) in a container using room temp water. I let them sit for several hours until they are thawed out. For the good eaters (ie woma, Children, king, etc), I would take their food out to dry on a basking lamp that I already use for my skink. Ten minutes later, food is served to the good eaters with zero issues.

For the more difficult feeders, I drain out the water and refill with warm water. I let the food sit in the warm water for no more than 10 minutes and then pat dry, and blow dry next to the room of where the picky eaters are. I mainly focus on drying the face of the rodent, into the ears, and rear area.

If I have a new snake that has a reputation of being picky, or the breeder has trouble feeding (Or the seller knows nothing), I would leave it to thaw on top of its cage hours before I warm it with a blow dryer.

Lastly, and this is with my baby kenyan sand boa, sometimes small babies need a little bit of help. Dry like the above but go easy on the blow dryer as it is probably a day old mouse pinkie that you are heating up (Dry by placing it inside a napkin). I would nudge the pinkie at her face until she understands it is food and takes it. Don't zombie dance the prey too much as it may scare the baby or shy eaters.