Rejuvenate Grout Deep Cleaner Cleaning Formula Instantly Removes Years of Dirt Build-Up to Restore Grout to the Original Color (32 fl oz x 2 Pack)

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This works pretty well on getting the hard water stains off my light-colored grout. It didn't touch the stains on the caulking around the bottom of the shower though, which is annoying since that means I have to find another cleaner for that. I can't say that it instantly removes years of built-up dirt. I did have to scrub at it a bit. It's not like it miraculously dissolves the stain. I had to scrub and rinse a couple of times. That said, it works better than the other products I've used.

I've used a few different grout cleaners throughout my home. This one has been the cheapest to buy, and does a decent job of cleaning the grout. However, I've definitely noticed that -- at least compared to some of the other grout cleaners I've used -- this one seems to be a bit less effective. Because of the cost, I'll probably buy this one again as we tackle the remainder of our home's grout cleaning, given how much of the product we'll still need. However, once I only need to spot clean here and there, I'll probably go with one of the more expensive options that seem to do a little better.I also don't love the way that this product pours. It seems to be optimized for use with something like a Swiffer, but I am using a scrub brush, meaning I really just wanted something that can pour directly into the grout itself. Without a smaller "spout," that makes it difficult to use this one for my intended purpose.

It works, but you have to get a scubb brush!

I did not take before and after photos. I wish I had now. This product did what it claims and in the time frame it claimed it would do it in.The area I was working in is a large kitchen, dining room, solarium sort of area. There was years of build up in some spots as it leads out to large patio area. The whole project beginning to end was a very quick process. I do recommend you get an actual grout brush with handle so you can stand to do this job. I did not do that and was on my hands and knees doing this project. Thankfully it was a quick process and the grout looks great.