Last Thursday I had a tile cleaning job in Utah county. Prepared for the usual and loaded up on basic tile cleaning necessities. I got to the job site and inspected the tile to find unexpected build up on the tile. Generally tile cleaning is a straight forward procedure, apply chemical, scrub grout lines, rinse and extract. Well this needed much more than that. I rescheduled for the following day to come back and acid wash with a buffer and a scrub brush. All said and done the results where great. So expect the unexpected.