Short answer: heat a steam cleaner, fit a small nylon brush, move slowly along each grout line so the steam loosens the dirt, then wipe it away with a dry microfiber cloth. Tap water is all you need.
What you need
- A handheld steam cleaner with a small brush head (nylon for most tiles)
- A dry microfiber cloth or old towel
- Tap water (distilled water if you have very hard water)
6 steps to clean grout with steam
- Sweep or vacuum first. Loose dust turns into mud once it gets wet.
- Fill and heat. Fill the tank with water and wait until the steam is ready.
- Test a small corner. Make sure your tile and grout handle heat well.
- Work one line at a time. Hold the brush on the grout and move slowly, about 1 inch per second. Let the steam do the work instead of pushing hard.
- Wipe right away. Wipe each section with a dry cloth while the dirt is loose, before it settles back in.
- Let it dry. Open a window or run the fan so the grout dries fully.
Where not to use steam
- Unsealed or cracked grout, natural stone that is not sealed, and unsealed wood
- Near electrical outlets or switches
- Brass brushes on soft or glossy tiles (they can scratch). Use nylon there.
Keep grout clean longer
- Once the grout is clean and dry, apply a grout sealer and follow the sealer's instructions.
- Squeegee shower walls after use.
- Do a quick steam pass once a month instead of a big clean once a year.
FAQ
Does steam kill mold in grout?
Steam helps lift surface dirt and mildew stains. Mold that has grown deep into the grout may come back, and badly damaged grout may need to be replaced.
How long does it take?
About 15 to 30 minutes for a small bathroom floor.
Is it safe?
Steam is very hot. Never point it at people or pets, keep children away while you clean, and let the nozzle cool before changing heads.
The tool for the job
Our Handheld Pressurized Steam Cleaner comes with nylon and brass brush heads, an angled nozzle and a long hose, so you can reach grout on floors and shower walls. Browse more home helpers.