Bests & Worsts Reviews from Amazon

I was skeptical to buy this product because of all the negative reviews I had read about the felt tip becoming ruined before the product was even out. I bought it anyway because we were having an appraisal on my house in a week and a couple years ago my ex used a sealant on the grout (stupidly instead of the cleaner) and the grout looked HORRIBLY DIRTY from my dogs. No matter how I scrubbed, even after getting all of the sealant off, it would look white again. I'm not sure what the people who had given it negative reviews had been doing with it but this product worked wonderfully and the felt tip was just fine once I was done. It's not like you push extremely hard and drag it across the grout. You shake it, push down until the paint covers the felt tip then glide it across the grout. Same as any paint pen. It made my grout shine and look brand new.