In the last few months, I heard about using dry rice as a seed dessicant. You can even mix it in with the seeds and pull it out later with a seive!
You can make a more powerfull dessicant or "regenerate" the rice by baking it in a shallow pan and sealing it tightly in glass jars while still hot.
I tried to get an estimate of "how hot?" but all I got was was "you don't want it to get brown" and "bake it longer, rather than hotter".
My guess is around 250 F.
