I was told when the house was built with the tile that every 6 mos you should use the vinegar on the floor and in between all you need to do is water to keep clean. The grout of course is a different matter I had someone come in and give me a price and he said you'll probably want to do it yourself. He said Home Depot has the thin brush and the stuff to clean it. I also tried a little brush with the clorox cleaner and the dirt comes off good except it will take a while to do and then seal it. I like the sound of the silicon based product so you don't have to keep doing it. I think if you use to many things on the floor maybe that's why your having a problem. We've had our tile over 20 yrs and it's just the grout that's messy looking on a white floor. I haven't been able to do the grout yet. Good luck with the vinegar and maybe try cooler water. Sue.