I bought some EdFred shower cleaner after seeing a video which was linked on a similar thread. It did the job on the shower and I also had read that it cleaned grout. I put it directly on the grout lines, used a small brush to brush it in, wiped up with a towel and when it dried the grout was like new. It's biodegradable (but I still wore vinyl gloves). No effort at all to clean up miserable-looking grout lines in our kitchen in front of the sink and cooktop. Worth every penny (shipping was more than the 16 oz. bottle). I'll be using it from now on. Here is a link that might be useful: Easily cleans grout

hey Bill - i still have some haze on my bathroom floor that i unfortunately left sitting for too long & haven't prioritized figuring out yet... it's been a couple months now. it's white sanded on white ceramic 12x12's. would this aquamix product help with that? the one that's called Grout Haze Remover says it only works within 10 days of grouting. thanks, lisa AQUA MIX NANOSCRUB is an abrasive cream cleaner designed to work where other cleaners wonÂt. It utilizes NanoSTG (nano-sized particles) to penetrate below tough stains, dissolve and lift them out. Especially effective for cleaning rough or textured surfaces. Also removes factory applied waxes and floor finishes, coating sealers, light grout residue (including epoxy), rubber and pencil marks, light mineral deposits, ground-in dirt and most sealer residues. NanoScrub is nontoxic, non-flammable and non-acidic. Uses Recommended for use on:  Porcelain, ceramic, polished and unpolished natural stone (such as granite, limestone, marble, slate, and travertine), grout quarry, saltillo, terra cotta, cement pavers, masonry surfaces, and other stone, tile and grout surfaces. Here is a link that might be useful: NanoScrub

Grout is important.When grout does its job  locking tiles tight, keeping out water, and giving floors and walls a finished look  nobody pays much attention. It's only when grout fails, becoming stained, cracked, or falling out altogether, that people take notice. But grout deserves more respect. "Not only does grout fill the voids, it makes the floor, wall, or countertop stronger by bonding the tiles together and preventing the edges of a tile from chipping and cracking. Cicliot

Same story. I picked out a dark grey I think it was Pearl Grey Maipei to go w Cle Tiles Slate plank floor tile. Grout looked awful - like 2-3 shades too dark when I wanted it to match. Thankfully my contractor is lovely, he said if it wasn't what I wanted he'd make it right. He filed out the grout by hand (tile edges are slightly chewed up, but he warned me) and regrouted w Custom Prism grout color Charcoal. I was much happier with the results. Now planning for my kitchen backsplash and this thread is making me reluctant to go with Maipei again, even tho on paper 77 Frost looks like it should be a close to perfect match to my Bedrosians Clara Matte Grey tile.