I just put my f/t in a plastic ziplock bag, make it airtight by rolling the bag, and set it in a bowl of very warm but NOT boiling water for about 10 mins. I take it out, feel to make sure the head/belly are soft, run it under some hot water for a few seconds just to make sure it's nice and toasty, then pull it out of the bag to give to Barry. Works like a charm, although I hear some people use even a hairdryer or heat lamp to warm it up.