Far too little is inside my many cans and a few have only kitty litter I realize that the dusty grayish grains of litter are Not good, but completely forgot about upgrading to either correct desiccant, or using enough of the correct types. The cans are in exc. condition have very tight seals, are mostly filled with cardboard ammo boxes, stored in an air conditioned area ( this seems like my prev. ads on Armslist). Edit: Noticed a guy using Fresh Step kitty letter made of 100% blue silica gel, from Walmart. This could work.