How to Clean Shower Grout: 10 Ways to Remove Mold and Mildew
Shower grout gets dirty fast. Water, soap scum, and humidity create the perfect environment for mold and mildew to grow, leaving dark stains that can make even a clean shower look dingy.
The good news is you don’t need harsh chemicals or expensive tools to fix it. With a few common household items and the right technique, you can bring your grout back to life and keep it looking fresh longer.
Gather Your Supplies
- Baking soda
- White vinegar
- Hydrogen peroxide
- Liquid dish soap
- Bleach (optional, for tough mold)
- Spray bottle
- Old toothbrush or grout brush
- Microfiber cloth
- Rubber gloves
- Bucket or bowl
10 Proven Methods to Clean Shower Grout
1. Start with a vinegar and baking soda paste
Mix baking soda and water into a thick paste and spread it over the grout lines. Spray white vinegar on top so it fizzes and starts breaking down grime.
Let it sit for 10 to 15 minutes, then scrub with an old toothbrush. Rinse well with water.
2. Use hydrogen peroxide and baking soda instead
Swap vinegar for hydrogen peroxide in the paste if you have colored grout. Vinegar can sometimes cause discoloration, but hydrogen peroxide is gentler.
Apply, wait 10 minutes, then scrub and rinse. It also helps kill mold at the root.
3. Try a dish soap and baking soda mix
Add a few drops of dish soap to your baking soda paste. The soap helps cut through grease and lifts away soap scum stuck in the grout.
Scrub in small sections and wipe clean with a damp cloth.
4. Spray on a vinegar and dish soap solution
Fill a spray bottle with equal parts white vinegar and liquid dish soap. Spray it directly on the grout and let it sit for 15 minutes.
Wipe or scrub with a brush, then rinse. This combo works especially well on greasy buildup.
5. Use full-strength hydrogen peroxide
Pour or spray hydrogen peroxide directly onto moldy grout. Let it sit for at least 10 minutes, no rinsing needed yet.
Scrub with a brush and wipe clean. Repeat if stains persist.
6. Make a bleach solution for stubborn mold
Mix one part bleach with ten parts water in a spray bottle. Apply only to white grout, never on natural stone or colored tiles.
Let it sit for 5 to 10 minutes, scrub, then rinse thoroughly. Always wear gloves and ventilate the room.
7. Use a steam cleaner for deep cleaning
Run a handheld steam cleaner slowly over grout lines. The heat loosens dirt and kills mold without any chemicals.
Follow up with a dry cloth to prevent moisture from lingering.
8. Apply oxygen bleach for safer mold removal
Mix oxygen bleach (like OxiClean) with warm water according to package directions. Spread it on the grout and let it soak for 15 to 30 minutes.
Scrub gently and rinse. It’s less harsh than chlorine bleach and safe for most surfaces.
9. Try a commercial grout cleaner
Pick a trusted grout cleaner from the store and follow the label instructions. Most require spraying, waiting, then scrubbing.
These are convenient for quick jobs but test in a small area first to avoid damage.
Prevent mold and mildew from coming back
- Wipe down shower walls after each use with a squeegee
- Run the bathroom fan during and after showers
- Keep a small towel handy to dry grout lines
- Reapply a grout sealer every 6 to 12 months
- Avoid using oily bath products that leave residue
Common mistakes to avoid
Don’t mix bleach and vinegar. The combination creates toxic fumes. Stick to one acid or one bleach-based product at a time.
Avoid wire brushes that can scratch tile or grout. Use nylon bristles instead.
Never skip rinsing. Leftover cleaner can attract more dirt.
Cleaning shower grout doesn’t have to be overwhelming. Once you find the method that works with what you have at home, it becomes a quick part of your routine. You’ll be surprised how much brighter your shower feels with clean grout lines.
