wow a new forum! i shall be the first contributor! 
recently i bought a kiwi kleen tough stain remover, and the
results are notably impressive. after applying the stain remover on
several 'dirty-looking' spots in my toilet for three consecutive
days... most of the stains have become invisible! then i tried
squeezing some of it straight at the 'flooded' part of the toilet
bowl (that part where it is filled with water)...... before that
the whole surface was all black and dirt filled, one week later i
realised the black dirt began to peel off bit by bit.
upon more usage, more and more black dirt peeled off! and i kept
doing the same thing until that part becomes totally white! i know
people may find it wasteful to use the stain remover this way, but
i'm sure some of you would love a clean looking toilet like i do!
