I had this problem on one of my frameless windows. It is because the seal the touches the window that opens was dirty from the factory. Open the window and take some cleaner and wipe both the seal and the window where the seal touches it. Clean everything really good and close it back up. Hopefully that will fix it unless there is some other kind of issue, but it sounds just like my issue.
__________________
2016 Ford F350 Dually
2015 Fuzion FZ371
|