This is great info....definitely a clue for me. A couple of years back I started using heat tape to bring them out of brumation and that about when the fertility issues started. Never even occurred to me that I could have them too hot?! Will cycle them again this year, but will rework the warm-up routine and see what happens next spring.

Tried breeding them both early and late in the season with same results, so I don't think that's it. I have heard that feeding breeders lizards is supposed to help, have you heard anything on that subject?

Thanks for the great suggestion.
Roger