My mother had mexican terra cotta floor tiles installed in her house in about 1989. For many years she has been using a product called Mop & Glow to "clean/maintain" these tiles, as well as vinyl tile in the kitchen area. There is now a very ugly, dirty-looking, build up of this product on all of the floors that we're now trying to remove.
We've been using Krud Kutter with a brush-type floor scrubber. Even after several applications we're still not able to remove all of the build up.
Can you recommend something that may work more effeciently on these types of tiles?