Dirty grout lines can make even the most expensive tile look cheap and grimy. While scrubbing with harsh chemicals is the traditional route, it’s exhausting and often leaves toxic residue behind.
Steam cleaning offers a powerful, chemical-free alternative that blasts dirt out of porous surfaces. It sanitizes as it cleans, restoring your floors or walls without the backbreaking effort. Here is the best way to steam clean grout safely and effectively.
Key Takeaways
- Steam cleaning is an eco-friendly method recommended by the Tile Council of North America for sanitizing grout.
- Always use nylon brush attachments; metal bristles can scratch tile and strip grout.
- Vacuum and wipe the surface thoroughly before steaming to prevent pushing mud into the pores.
- Apply a high-quality grout sealer after the area dries to protect your hard work.
Can Steam Cleaning Damage Grout?
Generally, steam cleaning is safe for grout. The Tile Council of North America lists steaming as an effective cleaning method (1). However, there are two exceptions where you should proceed with caution:
- Damaged grout: If your grout is cracked, crumbling, or poorly installed, the high pressure of the steam can blow loose pieces out.
- Silicone caulk: Avoid holding the steamer over silicone caulk (often found in corners or around tubs) for too long, as the heat can melt or distort it.
How to Steam Clean Grout
Grout is porous, acting like a sponge for grease, dirt, and lime scale. While surface wiping cleans the tile, it often pushes muck deeper into the grout lines.
Steam works by injecting high-heat moisture into those pores, loosening the bonds of the dirt so it can be wiped away. It is also one of the most reliable methods for killing bacteria without bleach (2).
Here is your step-by-step guide to revitalizing your tile.
- Time: 30, 60 minutes (depending on room size)
- Difficulty: Easy
What You’ll Need
Gather these supplies before you fire up the machine:
- Steam cleaner (canister or mop with attachments)
- Nylon brush attachment
- Distilled water
- Vacuum cleaner
- Microfiber cloths
- Old towel
- Grout sealant
1. Choose the Right Equipment
Not all steamers are created equal. You need a machine that produces concentrated steam and has the right attachments.
- Canister steam cleaners: These are best for large floor areas. They typically hold more water and come with long hoses and precise nozzle attachments.
- Handheld steam cleaners: Ideal for backsplashes, shower walls, or small spot-cleaning jobs.
- The attachment: Ensure your unit has a nylon grout brush or a detail nozzle.
Avoid Metal Brushes
2. Clear the Room
Steam cleaning involves heat and humidity, so protect your belongings. Move furniture, rugs, and pet bowls out of the room.
If you are cleaning a kitchen backsplash, clear the counters of appliances and utensils. This prevents tripping hazards and ensures you don’t accidentally steam sensitive items.
3. Pre-Clean the Surface
You cannot steam clean a floor that is covered in dust and hair. If you skip this step, the steam will turn that dirt into hot mud and push it deeper into the grout.
- Vacuum thoroughly: Run a vacuum over the tiled floors to remove loose debris, hair, and crumbs.
- Surface wipe: If there are sticky spills or heavy grime, give the floor a quick mop with water. You want the steam to focus on the grout, not surface stains.
4. Prepare the Steam Cleaner
Fill your steam cleaner’s tank. We highly recommend using distilled water. Tap water contains minerals that can clog your machine over time and leave white deposits on your dark tile.
Attach the nylon brush nozzle and turn the machine on. Allow it to fully heat up according to the manufacturer’s instructions; usually, this takes 5 to 10 minutes.
5. Steam and Scrub
Once the indicator light shows the steam is ready, begin cleaning.
- Start from the top: If cleaning walls, start high and work down. For floors, start at the farthest corner and work backward toward the door.
- Apply steam directly: distinct grout lines require focused attention. Hold the nozzle over the grout line and apply a burst of steam while scrubbing gently with the brush attachment.
- Work in sections: Do not try to steam the whole room at once. Work in 3×3 foot sections.
- Wipe immediately: This is the most critical step. As soon as you blast the dirt loose, wipe it up with a microfiber cloth. If you let it dry, the dirt will settle right back into the pores.
Safety First
6. Rinse the Floor
After you have steamed the entire area, the floor might look a bit streaky from the loosened grime. Grab a clean mop and a bucket of plain water.
Rinse the floor to remove any lingering residue. Let it dry completely. If you spot any stubborn areas, you can spot-treat them with the steamer again.
7. Seal the Grout
Now that your grout is deep-cleaned and open, it is vulnerable to new stains. You should always seal grout after a deep steam clean.
Wait until the grout is 100% dry (usually 24 hours). Apply a high-quality penetrating grout sealer. This creates a barrier that keeps dirt on the surface, making your next cleaning session much easier (5).
When to Hire a Professional
If you don’t have the time, or if your grout is severely stained with mold or mildew that consumer-grade steamers can’t shift, it might be time to call the pros.
Professional services use truck-mounted systems with higher PSI and heat than home units. They also include high-powered vacuum extraction to suck the dirty water up instantly (6).
FAQs
How Do Professionals Clean Grout?
Professionals typically use a three-step process: they apply a specialized alkaline pre-spray to break down oils, agitate the grout lines mechanically, and then use a high-pressure hot water extraction system (steam cleaning) to rinse and vacuum the soil away simultaneously.
Can You Use a Steam Cleaner on a Shower?
Yes, steam cleaners are excellent for showers. They effectively melt away soap scum, kill mold spores, and remove hard water deposits from tile walls and glass doors without using abrasive chemicals.
Will a Steam Cleaner Remove Mold From Grout?
Steam cleaners can kill mold spores due to high temperatures, but they may not remove the dark staining if the mold has penetrated deep into the caulk or grout. You may need to treat the area with a mold killer or hydrogen peroxide after steaming.
How Much Does It Cost to Steam Clean Grout?
Professional tile and grout cleaning costs vary by location and room size, but you can expect to pay between $0.50 and $3.00 per square foot. An average room might cost between $150 and $400 depending on the condition of the floor.
What is the Best Homemade Tile Grout Cleaner?
A paste made of baking soda and water is the best homemade cleaner. Apply the paste to the grout, spray it lightly with vinegar to create a fizzing reaction, scrub with a brush, and rinse well.
Can I Put Vinegar in My Steam Cleaner?
No, you should generally avoid putting vinegar in a steam cleaner. The acidity can damage the rubber seals and boiler components inside the machine. Stick to distilled water and apply vinegar externally if needed.
Keep Your Grout Looking New
Steam cleaning removes the headache from floor maintenance. It gets deep into the pores where mops can’t reach, leaving your home sanitized and looking fresh.
Remember, the secret to long-lasting results is sealing the grout immediately after you clean it. With a little maintenance and the right tools, you won’t have to dread looking at your floors anymore.
