I keep my scratch feed in a 8 gallon metal trash can. With all the rain we've gotten this year, my scratch feed has been getting water in it from just from moisture in the air seeping between the lid and can (not airtight), condensing and dripping on the feed. Then it gets moldy. I try to air it out when I can, emptying it all out, spreading it out on an old towel, and putting it back in. I also buy scratch in smaller amounts from the birdseed area and mix my own instead of buying the 50 lb bags. What can I do to keep water/moisture from getting in there? I can't use plastic, the squirrels gnaw through it.