Hi Guys
Had the same sort of thing recently where customer insisted on dry cleaning, HWE had failed previously on dirty office tiles.
I suggested LM he said I do not want any water.
Looked at carpet dry granule was not going to work, as I discussed further he actually wanted LM , had used it before but had been sold as completely dry.
Sometimes we can get too technical for our own good, LM is effectively dry in an office situation.
Cheers
Doug