Las Vegas homes have a lot of tile — it’s the practical choice for a desert climate where hard surfaces withstand the heat, are easy to clean, and don’t trap allergens the way carpet does. But tile is only as clean as its grout, and grout is notoriously difficult to maintain. The porous nature of cement-based grout means it readily absorbs minerals from Las Vegas’s hard water, soap residue, dirt, and mold spores, turning white or light-colored grout gray, brown, or even black over time.

Know Your Grout Type

Most Las Vegas homes have cement-based grout, which is porous and requires sealing. Epoxy grout, more common in commercial settings, is non-porous and much easier to maintain but also more expensive and less common in residential installations. Before applying any cleaning product, it’s worth knowing which type you have — you can tell by dropping a small amount of water on the grout. If it absorbs within a few seconds, it’s cement-based and needs to be sealed. If the water beads, it’s either epoxy or was recently sealed.

Routine Cleaning: Weekly or Biweekly

For grout that’s regularly maintained, a simple solution of dish soap and warm water applied with a stiff-bristled grout brush is sufficient. Spray the solution on, let it sit for two to three minutes, scrub the grout lines, and rinse. The key is using a proper grout brush — a toothbrush works in small areas but is too slow for a full floor or shower. Dedicated grout brushes with angled heads fit into the grout channel and clean it efficiently. Do this weekly in the shower and biweekly on floors to prevent buildup from setting.

Moderate Staining: Baking Soda and Vinegar

For grout that has started to discolor, apply a paste of baking soda directly to the grout lines, then spray with white vinegar. The fizzing reaction helps lift embedded dirt and mineral deposits. Let it work for five to ten minutes, then scrub and rinse. This method is safe for sealed grout and won’t damage adjacent tile surfaces. It handles moderate discoloration effectively and is a good monthly maintenance treatment even for grout that looks reasonably clean.

Heavy Buildup: Oxygen Bleach

When grout has become significantly darker and the above methods aren’t restoring its color, oxygen bleach (sodium percarbonate — the active ingredient in OxiClean and similar products) is the next step. Mix the powder with hot water to form a paste, apply it to the grout lines, and cover with plastic wrap to prevent it from drying out. Leave it for 30 minutes to two hours, then scrub and rinse thoroughly. Oxygen bleach is far safer than chlorine bleach — it doesn’t produce toxic fumes, won’t damage colored grout, and is safer around children and pets once dry. It’s also highly effective at killing the mold spores that cause grout to darken in humid areas like showers.

Severe or Permanent Staining

Some grout staining is too deep or too old to be removed with cleaning alone. In these cases, grout colorant or grout paint — applied over clean grout — can restore a uniform appearance without the cost and disruption of re-grouting. Professional grout cleaning services use steam cleaners and rotary brushes that reach deeper than hand scrubbing, and can restore grout that appears permanently stained. Re-grouting is the last resort and makes sense when grout is cracked, crumbling, or has developed gaps that allow water behind the tile.

Sealing: The Most Important Step

Clean grout should always be sealed. A penetrating grout sealer fills the pores of the cement so that minerals, soap, and dirt can’t penetrate — they sit on the surface and wipe off instead. Apply sealer after deep cleaning and again every one to two years depending on the product and the area (shower grout needs more frequent resealing than floor grout). Apply with a small brush or a roller applicator, wipe away any excess that gets on the tile surface, and let it cure for 24 hours before exposing to water. This single step dramatically reduces the cleaning effort required to keep grout looking clean and is the difference between low-maintenance tile and a constant battle.