an adult mouse take about an hour to an hour and a half to fully thaw. regardless of what you're thawing I have a simple trick for when to start heating the mice. I wait till they feel soft and are seemingly sweating. I keep my heat lamp around 8 to 10 inches above them while I heat them too. Make sure once you start heating to check on them every five minutes or so. Once they are nice a fluffy and warm i hold them up under the light for like 10-20 seconds then offer it to the snake. Like I said, also try putting her in a tub or box with a hide next to them before offering. The smell helps stimulate the snake a ton!