I use liquid SoftScrub, and scrub it with a kitchen scouring pad. The kind of pads that are half sponge and half scrubber. It worked great for me. I tried bleach on my tub too and it didn't work. Bleach seemed like it would have been the thing to do the trick too, but it wasn't. Don't know what the difference would be between softscrub and bleach because they are both a bleach. I like to know about the lemons also. I bet it would smell lemony fresh!