Grout is porous, which is exactly why it stains faster than the tile around it and why so many home remedies either don't work or slowly wear the grout down. Here's what actually gets it clean, room by room, without damaging it in the process.
The basics that actually work
A soft-bristle brush, warm water and a pH-neutral cleaner handle most everyday grout grime. For built-up stains, a paste of baking soda and water left to sit for a few minutes before scrubbing lifts more than either ingredient alone. The key is patience over force: grout responds to time and gentle repeated scrubbing, not aggressive pressure that can wear down the surface.
Bathroom tile and grout
- Shower and tub grout sees the most moisture, so it's the most prone to mildew: ventilate after every shower to slow it down
- Scrub grout lines in a circular motion, rinsing the brush often so you're not just redistributing grime
- Squeegee tile walls after showering: this single habit cuts grout cleaning time dramatically over weeks
- Floor grout collects hair and soap residue; a weekly pass with a grout brush keeps it from setting in
Kitchen backsplash and floors
Kitchen grout deals with grease rather than moisture, which means a degreasing pH-neutral cleaner works better than the vinegar-based approach some people use in bathrooms. Wipe backsplash grout right after cooking, while grease is still fresh, rather than letting it bake on with repeated use of the stove.
Grout responds to consistency, not force. A quick weekly pass beats one aggressive scrub every few months.
What to avoid
- Vinegar on natural stone tile: it etches marble, travertine and limestone over time
- Bleach on coloured grout: it can lighten or discolour it unevenly
- Steel wool or abrasive scouring pads: they scratch both tile and grout surfaces
- Excess water left standing on grout, which encourages mildew growth underneath
Sealing grout
Unsealed grout absorbs stains and moisture far faster than sealed grout. Most grout benefits from resealing every one to two years, which is a quick way to make future cleaning easier and slow down discolouration. If regular grout upkeep is more than you want to manage, that's the kind of detail work covered in a deep clean and then maintained on a regular schedule after.