i had a problem once with a tea stain. the lady told me she spilt it the other night and rubbed it with towels.
i went through my basic stuff of 'you should have blotted etc etc'
i ran my eyes over it and set the machine as normal. to be honest, although the stain was quite dark, its nothing my usual solution wouldnt remove.
in fact, i was so confident, i didnt pre spray, i just went in with the steam.
the stain almost all come out. and the lady was very happy. although something was niggling me. i dried the stain as best as i could and went over it again for good measure. andi was right... right bang in the centre of the stain was another chemcial which the lady had 'forgotton to advise me of'
when asking her she denied using any chemical, just told me she rubbed towels into the carpet thinking that would remove it.
luckily, i got most of 'her' chemical up and by gently using a bit of stain pro and a white towel, got that little last bit out.
pez