Adam,

don't for any reason, use glass or general purpose (409, Clorox) cleaner. I use 303 cleaner and protectant.

http://www.303products.com/main.php?infopage=kits

The 303 is a little pricey, but it’s worth it. My top isn’t that old, but it was starting to turn a little gray (sun fade). 303 made it look like new. I use the cleaner on the window but not the protectant. The protectant will leave swirls.

Also use a sponge or micro fiber cloth to clean the window, and use a squeegee to pull the water off. This reduces scratches.