Best way to store seeds is to put them in an opaque paper envelope with a decsicant (spelling?) and place in the BACK of the fridge. Putting them close to the front will just encourage condensation from the door opening and closing all the time. By putting them at the back of the fridge there will be much more stable temps there. A good moisture absorber (avoiding that word!) is dry rice. Silica works the best though. The best possible storage would be to use a fridge that is dedicated to seed storage. That way the door stays closed and the temp inside stays as stable as possible.

TGT