I share your problem, I have the same issue. The seal on mine actually came loose on one lower corner and the glass seemed to be leaking also at the top. I fixed the top and cleaned the lower corner area very good and reapplied it with RVT silicon, it leaked the very next rain. I am out of town and 3 RV dealer techs referred me to a glass company that says they no longer do them because of high failure rates after they rebuilt them. All said the problem is caused by failure of a double sided tape that is used to hold the glass in. I am waiting on a dry day to have another glass dealer rebuild it, they have experience with them and don't understand the failures. I wish I could say I feel comfortable having it rebuilt, all the dealer techs say replace the complete window unit($$$$). I am tired of the plastic, duct tape and being nervous every time it rains, we did survive a tropical storm with out it leaking but another one leaked a little.