How to remove loose grout wedged between tiles
When loose grout pieces are wedged tightly into gaps instead of sticking to the joint, power tools like multitools just push the material around instead of grinding it out. This makes it nearly impossible to clear out the channels properly for new installation without resorting to manual scraping or stabilizing the loose bits first.
What the numbers show
Counted from the threads quoted below. How we count
- People have been saying this in most months since September 2026.
- This comes up 16.4× more often in r/CleaningTips than across the site as a whole.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
Found another way around this?
Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.
- 1Use a putty knife held vertically and hit it with a hammer, tilting it to use the sharp corner.Did this help you?
- 2Use a flat head screwdriver or chisel to crush the pieces and vacuum them up.Did this help you?
- 3Use a drill with a thin bit running up and down the crack.Did this help you?
- 4Using hydrogen peroxide based cleanersDid this help you?
- 5Pre-cleaning with a degreaser to break out soap scumDid this help you?
- 6Using a steam cleanerDid this help you?
- 7Grinding out and replacing the old groutDid this help you?
- 8Using grout removal tools and wetting down the hardened thinsetDid this help you?
- 9Risking walking on the tiles early while the thinset is still somewhat softDid this help you?
- 10Using a drill-attached scrubber brushDid this help you?
- 11Scraping the residue off manually with a fingernailDid this help you?
- 12Scrubbing with an aggressive brush and dish soap or grout cleanerDid this help you?
- 13Using a magic eraserDid this help you?
- 14Using an abrasive material like salt and grinding it with a towel and footDid this help you?
- 15Scraping out the affected grout and regrouting the areaDid this help you?
- 16Finding out if the stain is oil- or water-based to use a specific grout stain removerDid this help you?
- 17Asking the contractor who made the mess to fix itDid this help you?
- 18Removing the material and replacing it with new silicone caulkDid this help you?
- 19Soaking strips of kitchen roll in bleach and leaving them on the grout for hoursDid this help you?
- 20Applying a thick paste of baking soda and hydrogen peroxide and scrubbing with an old toothbrushDid this help you?
- 21Using a dedicated grout cleaner like Zep or diluted oxygen bleachDid this help you?
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“The previous owners did a TERRIBLE grout job in the shower and I’m not sure how to clean it.”source ↗
“I am scrubbing with a sponge and it’s not working 😣”source ↗
“she said she couldn’t get this out of the grout. I used the premixed grout (never again, it was horrible to install and now this).”source ↗
“These are TINY grooves. I tried one of those scrubber brushes you attach to a drill and it took me 15min to clean a 2sq ft area.”source ↗
“Is there something easy that would fix this or do I just accept the baked in dirt?”source ↗
“However, they have all these yellow-brown nasty looking patches all over them, and I’m having trouble removing them.”source ↗
“So far, I’ve used a fairly aggressive brush and tried dawn/water, Zep grout cleaner, and magic eraser to no avail.”source ↗
“Lol I would keep using my fingernails if it weren’t all over the place. I have not tried alcohol. It doesn’t seem like an adhesive - it has a crusty texture”source ↗
“I’m worried the thinset will be too hard to clean if I wait an extra day.”source ↗
“The grout lines are 1/16” so it’s kind of a pain. Going to 44 hrs might be pushing it. There was a lot of bleed out in the grout lines. I don’t want to get myself in too deep.”source ↗
“I used a multitool and a grout grinder to remove all the rest. This area the grout is already loose, but is wedged into the gap. Its very hard to grind because it is lose and just moved around.”source ↗
Where this came up
People with this problem also raised
- 6How to get thinset and cemented bricks off a concrete floor
- 17How to get dark buildup off bathtub caulk
- 17How to fix white spots on a shower floor finish
- 2How do I remove just one tile from a fireplace surround?
- 4Pulling off the substrate when removing window caulk
- 3How to get dried mud and rocks out of shoe treads