HELP!!! The owner before me painted over wallpaper. I have been trying to strip it but no matter what I use (DIF and HOT water, steamer, etc) a yucky layer of gummy paste is still stuck on the wall. I can't seem to get it up without tearing up the wall itself. I've already got a lot of spots with brown cardboard looking stuff where I have stripped it down so bad coz the wall gets so wet. Is there anything I can do to get this off without ruining any more of the walls? My husband refuses to go with the idea to rip them all out and put up new drywall so I'm kind of stuck.