I tried fermenting some seeds, just for experiment. I usually don't, as it seems like too much trouble. Also, I just don't feel as my seed saving techniques fro most things are up to snuff to give seeds away with confidence.
Anyway, I was concerned about fruit flies, so when I set down my plastic cups of seeds/gel/water, I gave a house spider in the kitchen corner a wink and a nod. It turned out to be a clever spider and "got" the message right away. When I checked the seeds today, the spider had spun a web all across and among the cups. I didn't even have to twitch my nose or chant an incantation.