Use a mixture of baking soda and vinegar, scrub with a brush, and rinse for effective deep cleaning of tile grout.
Dirty grout can make even the cleanest tile floors look dingy. While tiles are easy to wipe down, the porous grout between them traps dirt, grease, and mildew. With the right techniques, you can restore your grout to its original bright color.
Why Grout Gets Dirty So Quickly
Grout is a porous material made from cement, sand, and water. Unlike smooth tile surfaces, grout has tiny holes that absorb spills and dirt. In kitchens, grease splatters stain grout lines. In bathrooms, soap scum and mildew thrive in damp grout.
Unsealed grout absorbs stains even faster. Many homeowners don’t realize grout needs resealing every 1-2 years. Without this protective layer, grout discolors quickly.
Types of Grout
- Sanded grout – Contains sand for strength, used for wider joints
- Unsanded grout – Smooth texture, ideal for narrow joints
- Epoxy grout – Most stain-resistant but difficult to install
Best DIY Grout Cleaning Solutions
1. Baking Soda Paste
This gentle abrasive lifts stains without damaging grout:
- Mix 3 parts baking soda with 1 part water to form a paste
- Apply to grout lines with an old toothbrush
- Let sit 5-10 minutes
- Scrub in circular motions
- Rinse with warm water
For tough stains, use hydrogen peroxide instead of water. The bubbling action helps lift deep-set dirt.
2. Oxygen Bleach Soak
Oxygen bleach (like OxiClean) brightens grout without harsh fumes:
| Materials | Steps |
|---|---|
| 1/4 cup oxygen bleach 1 cup warm water |
1. Mix solution in spray bottle 2. Spray on grout lines 3. Let sit 15 minutes 4. Scrub with stiff brush 5. Rinse thoroughly |
3. Steam Cleaning
For a deep clean without chemicals, use a steam mop. The high-temperature steam loosens dirt and kills bacteria. Move slowly over grout lines to allow steam penetration.
Professional-Grade Methods
1. Grout Cleaning Brush Attachments
Specialized brushes like the Grout-Eez attach to drills for powerful scrubbing. These save time on large tile areas.
2. Commercial Grout Cleaners
Products like Zep Grout Cleaner contain stronger cleaning agents. Always test in an inconspicuous area first. Pair with a deep cleaning scrub brush for best results.
Preventing Future Grout Stains
- Seal grout annually with a penetrating sealer
- Wipe up spills immediately
- Use bath mats to reduce shower moisture
- Sweep floors regularly to prevent dirt buildup
- Consider epoxy grout for new installations
When to Call a Professional
If grout remains discolored after deep cleaning, it may need replacement. Professionals have industrial steam cleaners and can regrout if necessary. Severe mold issues also require professional treatment.
For maintaining clean grout between deep cleans, use a antibacterial spray during regular cleaning sessions.