Just wanted to tell you that I first applied your product to my grout a little over 3 years ago. (almost 4) We had some new tile put in formerly carpeted areas and there was a marked difference in the old and new grout. So I used your product to give a uniform look to all the grout – it all looked brand new! I occasionally (not often) “touch up” high traffic areas and am just now ordering another pint to have on hand, if needed. I’ve had people mention how clean my floors look – I don’t think they realize what a difference the grout makes. Thanks for an awesome product!