Just another thought...

If I was the breeder that sold you one of the two hets, I would probably be willing to take your female on a generous breeder loan after you missed on at least two clutches, and put her with my homozygous male. It wouldn't prove definitively that either snake wasn't a het, might prove your female is, and would give you a clutch of definite 100% hets (and maybe visibles). Thats not to say that Bob or "Joe" would handle it the same way, its just my way of thinking. The end result of the breeding loan may be dependent on which "het" I sold you, and what the results were, and possibly even what the other breeder was willing to do.

Steve