I do loads of tile and grout cleaning and i wont use a spinner it makes to much mess, i use a rotary scrubber with water tank and a anti splash skirt and a wet vac, cleaning tile and gtout is a bit like cc you need the cleaner to dwell on the grout and tiles to get them really clean, believe me i have tried everyway and this is the best way, plus you have a rotary to buff the tiles up to make them look as good as new. I have been a tiler for 20 years and this is a good market to get into, plus repairs etc. Good luck Andrew