Hello Gary!
As per your sliding screen door, you must keep the tracks clean, clean, clean, at all times. This is hard to do when it is getting constantly walked on. We had the same screen on our '98 Pat Monticello, as well, and we couldn't get it out of there fast enough! It was such a pain to deal with and never did, in my opinion, give anyone quick access into or out of the coach. It was a poor idea on Beaver's part and cheap to boot! Our plan was to have a screen door made to fit but that never did come to fruition. Too many other more important things to deal with always came up instead! LOL!
Best, Carol