How to Clean Bathroom Grout

Why Bathroom Grout Gets So Dirty

Grout is porous by nature, which means it absorbs moisture, soap, dirt, and bacteria like a sponge. Over time, white grout turns gray or brown, and in humid bathrooms, black mold can take hold in the lines. Regular cleaning keeps grout looking fresh and prevents permanent staining.

What You'll Need

• Grout cleaner or baking soda paste
• Grout brush or stiff-bristle brush
• White vinegar
• Spray bottle
• Rubber gloves
• Microfiber cloths
• Grout sealer (for after cleaning)

Method 1: Baking Soda and Vinegar (Natural)

This is the most popular DIY method and works well for moderately dirty grout.

1. Sprinkle baking soda generously along the grout lines.
2. Spray white vinegar over the baking soda using a spray bottle. It will fizz — that's normal.
3. Let the mixture sit for 5–10 minutes.
4. Scrub vigorously with a grout brush.
5. Rinse with clean water and dry with a microfiber cloth.

Method 2: Commercial Grout Cleaner (Faster Results)

For heavily stained or neglected grout, a dedicated cleaner works much faster than DIY methods.

1. Apply Zep Plus Grout Foaming Cleaner directly to grout lines.
2. Let it foam and penetrate for 3–5 minutes.
3. Scrub with a grout brush.
4. Rinse thoroughly and dry.

Method 3: Steam Cleaning (No Chemicals)

A steam cleaner is the most effective chemical-free option. The high-temperature steam penetrates deep into porous grout, killing bacteria and mold while loosening embedded dirt. Simply run the steam nozzle along each grout line and wipe away the residue.

How to Keep Grout Clean Longer

• Seal grout after every deep clean with a grout sealer — this creates a protective barrier against moisture and staining.
• Wipe down tiles weekly to prevent soap and mineral buildup.
• Run the exhaust fan during and after showers to reduce humidity.
• Address mold spots immediately before they spread.

How Often Should You Clean Grout?

Light cleaning weekly, deep scrubbing monthly, and resealing every 1–2 years is the ideal maintenance schedule for bathroom grout.

Recommended Products

• Zep Plus Grout Foaming Cleaner — 2-in-1 clean and protect
• Grout Sealer (Clear, Professional Grade) — long-lasting protection
• Foxtrot Living Grout Brush — long handle, hard bristles
• It's Just Baking Soda (1.25 lb) — natural grout scrub
• McCulloch MC1385 Steam Cleaner — chemical-free deep grout cleaning