Most of my chondros will not accept wet mice....strike, wrap, and drop. Hot water and a bag work ok. I just use a lamp or heat pad. Sometimes steam heat works great too. I know several people that use hair dryers.
Will, I wouldn't worry too much about chondros feeding every time you offer. I have some males that eat only 10-12 meals per year. One male in particular is 14 years old and a breeding machine. Females rarely refuse food with the exception of shedding, reproduction, or illness. There are plenty of tricks to getting them to feed.