I've been in such a rush lately I missed these last few posts.
Green Ghost, I initially thought you were concerned with what is fondly referred to as the "yuck factor". You might consider dipping the larvae in mild bleach solution. Of course you would need to research your frog's sensitivity to bleach, but it is used extensively as a sanitizer in food preparation facilities. I've read that bleach will dissipate quickly and leaves no residue.
Assuming you don't have any BSFL I would be happy to test this idea in a few weeks, after I get a new colony established. I have little doubt that the larvae will survive a brief submersion. If you wanted to be especially cautious you could use only prepupal larvae since they are inherently "cleaner".
