I thaw mine in a old Tupperware in slightly hot water and let it sit about 30 min until the water cools then check and make sure its soft. I usually gave to flip it so the other side can get heat. Then I empty the water and take the container to the one they feed in, open the bag, and feed the snake. They give me no issues other than taking the rat from the wrong end by accident. I've never had guts come out but I have had gooey slime left behind and then I usually wipe the snake down with a damp cloth before placing back in the enclosure

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