I had/have a similar issue with my REI half dome tent. I've been meaning to get some clear FlexSeal spray to cover up the seams. I'm going to turn it inside out, line up the seams with painter's tape, then spray. How long have you had yours? I would hope the newer REI tents don't have that issue - mine's about 6-7 years old and barely used but my ex did store it in the garage when it's 118 degrees in Phoenix. Good luck.