I have a aluminum tool box in my bed and I can't seem to keep the inside dry winter or summer it must be condensation anybody else have this problem and if so anybody got a cure. I'm thinking about putting in some vents in the back or sides but I don't want to make worse.

Mine has had water in it for weeks now but thats' my own fault. I had a whole bunch of wet ski gear in there. Otherwise my weatherguard seals out everything. Could be that your weather seal is worn. You might try contacting the manufacturer and see if it's replaceable.

If it is possibly condensations you could go to an RV store and get the salt packs that wick out the water in the air. They use these to keep the moisture down in the RV's during storage.

Is it mounted to the floor? Make sure water is not coming through the mounting holes.

My weather guard keeps everything dry. Seal gone?