Jim's advice is sound. He says he wipes things over with a damp cloth prior to storage, fair enough, but make sure the dampness from the cloth has dried off before you put things away. If you want to buy silica gel you can buy it for pin money from 7 day shop.
http://www.7dayshop.com/catalog/prod...oducts_id=8333
Fungus is the real enemy with lenses, fungus loves damp surfaces.
Duncan.