I had to take my sliders out and disassemble, clean, and reassemble what was left of them(a large portion of the aluminum track is missing on both sides due to corrosion). After seventeen years of road salt and dirt, I couldn't close either side fully, and the constant wind howling was annoying. A little maintenence and they work great now, even with a large portion of the track gone. Even when i couldn't fully close them they didn't leak. I suppose in 17 more years I'll have to do this again and have to actually buy the corroded parts, but the whole process of removing them is quite easy. I do have to take them out in the next year or so again to paint, and could never imagine not having sliders, I use them alot.