You can use Vapor Phase Corrosion Inhibitors which will prevent corrosion. http://www.bull-frog.com/products/
Or you can use a dehumidifer like the Eva-Dry. http://www.eva-dry.com/products/?utm...55)%20292.6460
Or get a bag of crystal cat litter (100% silica gel without any additives) , and and old pair of socks/pantyhose/etc. and make your own.