I'll throw this topic out for discussion. No experience with cloth tops. The Brits us a product I think called Fabsil?? Comes in spray on and paint on. Don't know if that's available here. Im guessing it's like a 3m scotchguard, as it seems to make the water bead off and not pool on the top. I figure once a year or so to spray on the scotchguard. The manual just mentions to keep it clean but nothing about any sprayons.