Why rei-nvent the wheel?
Toss your frozen rats in a rubbermaid and add the hottest water you can get from the tap. Drain water and repeat once an hour until the rats are thawed and hot.
Dry with a paper towel and feed.
This is the way I do it and it works like a charm..
1.1 Pastel
1.1 Het albino
1.2 Het pied
0.1 Lesser
1.1 Mojave
1.0 Black pastel
0.1 Normal
1.0 bumble bee