I've had success by leaving the f/t mouse or rat defrost in room temperature in the room that the snake is in. That helps pre-scents the room. I wait until the rodent is nice and soft until i put the rodent in a zip lock bag. Then I dip that bag in hot water for 10-12 minutes. You'll know when the rodent is ready by touching it's stomach and feeling it being warm and squishy. Grab the rodent by it's tail or scruff and offer it to the snake. If she doesn't strike at it right away, leave the rodent in the enclosure for the night.