Black streaks on sides of slideouts

[twindman]

I read how to clean these somewhere, but can not find it while searching. Any ideas. Oh, they are from the seals on the side of the slides.
Also, I tried WD-40 and it works, but wondered if it messes up the walls.

[jcurtis934]

Crystal boat soap from west marine works very well full strenght on these. I don't get the streaks anymore since I stopped using the seal lube I got from camping world. John

[bigskyjimmy]

Goof-Off works great for me ,I have to do it every few months

[richfaa]

We have always used awesome.

[Tom S.]

After you get the slide outs clean, put some baby powder on the seals to keep the them from sticking to the slide outs.

[WaltBennett]

Mineral oil works great & also lubricates the seals.

[kdeiss]

X2 Awesome