I've noticed on these forums when people talk about leveling - ah - that's close enough. Well, we have discovered with our coach that if we are not level, the slides will leak. The proper procedure for leveling should be followed. Sometimes the seals don't come out like they should when the slide comes out - pulling that seal out where it should be can make a difference too. Some people just don't pay attention to things, they don't clean things and they don't do maintenance. That may be the difference with experiences with slides. Sometimes there are things you need to do to keep your rv nice and all things operating efficiently.