Review on Ultimate Power Drill Brush Set for Efficient Cleaning - Grout Cleaner, Scrubber, and More! by Jeff Grindley

That certainly changed the grout and it was relatively easy. It's a lot easier than rubbing with your hands. I might be motivated to clean all floors this way piece by piece. It was a little less efficient in the toilet so I was a bit frustrated. I have used it on 3 different toilets in the house which have varying degrees of stains and other issues. The brush worked best on the underside of the edge it was cleaning. It's hard to see the benefit of yellow stains on the bowl itself. I was hoping this would clean the toilets spotless all of a sudden but I used a cordless drill until the battery died and although all 3 toilets look better (and I've cleaned some grout!) they aren't in porcelain- Perfection. strive I still love it and plan to keep using the drill brushes until I get the results I'm hoping for, but I think it's worth noting that getting it completely clean will be a long process rather than a one-off effort.