Anybody have any ideas for cleaning old tile? This is SO nasty ... but, our house is 80 years old, and the previous owners were lifelong smokers ~ and from the looks of the tile & grout in our bathrooms, they must have done all their smoking in there, with the doors closed! I have LITERALLY spent DAYS in there scrubbing (4 hours at a time), with every cleaner I could find, and the tile will LOOK clean and white, but my cleaning rag will ALWAYS get brown, like its down in the pores of the tile, or something. I just hate that my family is stepping out of the tub onto this floor, for nicotine or whatever to seep up through their skin! I know we just need to replace it, and that's on the to-do list....after the kitchen is done! Any ideas in the mean-time?