I was up yesterday and the rear door/ramp on my enclosed was frozen shut when we got back. I assume there was some water on the seal and it froze to the trailer body. There was nothing we could do to open it, me pushing/kicking from the inside while someone pulled from the outside, etc. This is the first time this has happened. I was going to put some silicone lube on the seal to hopefully prevent this from happening again, but I was wondering if there was something better.