I just want to offer a helpful hint. You people have been great when I needed help, now it's my turn to help.
Last week we did a complete water change. I noticed a ring around the top of the tub where the water line was. From lotions, deodorants etc. I had read somewhere on this forum to use Mr. Clean Soft Scrub Sponge ( I think it was Vinny ). Well, I did use it, and it really did a great job. I tried Windex first, but that didn't do anything. With the sponge all I had to do was wipe, and it was clean. Great stuff.