For many seasons I put a Damp Rid in my PUP, and every season, it was a solid mass, but no water ever accumulated in the bin. I got the TT out of storage and got it home. The Damp Rid in one of the rooms was pretty full of "water" but I have not drained the anti-freeze yet. So, I simply open the door and dump it on the gravel outside the steps. Ok, so it's NOT just water much to my chagrin. It's some sort of sticky mess that never dried, and I was tracking it in and out of the TT all day restocking it! It stained my entry mats and got everywhere. I finally sprayed the gravel down with some Simple Green and rinsed it off, but even then it was still discolored. Ugh! So, the "stuff" in the damp rid basin isn't just water... now I know!