limescale
Lots of dirty-looking limescale in your toilet under the water line?

Fill it with vinegar - one of the cheap half-litre bottles from the supermarket should do it (two if you're really filthy). Leave it as long as you can, preferably overnight. And flush.

Clean, isn't it? (Your bathroom will smell of fish and chips, though.)
(pandora peroxide thinks it's a blocker, master! on, Mon 4 Dec 2006, 15:31, Reply)