Hi does anyone else have problems with their windows leaking? Van was built feb 2015. Have it stored in driveway without a cover at the moment. Windows on bunk side both leaked with rain, wet mattress's. Went back to be fixed along with a long list of other stuff under warranty, they have moved the catches back on all 3 bunk windows, but with rain last night bottom bunk window has leaked again. What can I do???