Cleaning Shower & Bathroom Grout

Almost everybody tries the same thing first. A stiff brush, a spray bottle of bathroom cleaner, and a good half hour on your knees. The grout looks better for a day or two, then the dark comes right back, usually in the same spots along the bottom of the wall and in the corners. That's not because you didn't scrub hard enough. It's because the discoloration you're fighting isn't sitting on top of the grout where a brush can reach it.

Store-bought cleaners are built to work on a glazed tile face, which is basically glass. They lift surface film fine. Grout is a different animal. It's cement, and cement is full of tiny pores, so the soap scum and body oil that rinse down the wall soak in and set up shop below the surface. Your brush scrubs the top of the grout while the stain lives a couple millimeters down, out of reach.

Bleach makes it look like you won, which is the sneaky part. It doesn't remove the gunk, it just strips the color out of it so the grout goes pale for a while. The oily residue is still down in the pores feeding mildew, and once the bleach fades you're back where you started, now with grout that's a little more brittle from the chlorine.

A shower is the one place in your house where grout almost never fully dries out. Every warm shower drives moisture and vapor into those porous lines, and they wick it in like a sponge. Water carries three things with it: soap scum, the oils off your skin, and dissolved minerals from your water. All three get pulled into the pores, and when the surface finally dries they stay behind, layered up shower after shower.

The colors tell you what you're dealing with. Orange or rust streaks are iron and minerals oxidizing out of the water. A pink or salmon film is usually a moisture-loving bacteria that thrives on the soap and oil residue, not actual mold. Black or gray patches are mildew rooting into that same buffet. None of it is a surface stain, and none of it clears out until the pores themselves get flushed. That's the whole problem in one sentence: the grout is soaked, and what's staining it is soaked in with it.

We don't scrub the surface and hope. Your technician works a cleaning solution into the grout and then runs a professional buffer over it, which does the thing a hand brush can't. The rotating brush scrubs deep into the pores and floats the trapped soap, oil, and mineral deposits loose, reaching down into the recessed line instead of skating across the top. Then the grout is rinsed and the dirty water and everything in it is wiped straight off the wall, so it leaves the surface instead of settling back down. The grout comes back to its real color because we're pulling the stain out rather than bleaching over it.

The method flexes to the surface. On a ceramic or porcelain tile shower we can scrub it firm. On a natural stone shower, travertine or marble, we switch to a pH-balanced solution and never touch it with anything acidic, because acid etches stone. Either way you get the same finish: grout that's a shade you probably forgot it was. And it's backed by our 100% Satisfaction guarantee. If you're not happy with the result, it's free.

We walk through the full deep-cleaning process on our how tile & grout cleaning works page, and every job is backed by our 100% satisfaction guarantee.