We have a 2004 28RSS, We found the wall next to our front left bunk with bubbling wallpaper and the wall feels slightly mushy behind it mostly near the roof. We re cauked any suspect areas on the roof and bunk window but we dont know what to do about what seems like water damage to the wall. Should we wait it out until the wall is not mushy anymore? Just a small portion of the upper wall is still slightly soft (this happened about a week ago after powerwashing the roof)How should we go about repairing the bubbled wallpaper? Any thoughts would be great!