This is in response to the article this week!

 My brother-in-law is in the grout cleaning business... NEVER NEVER NEVER use vinegar or bleach. Bleach is caustic and vinegar is acidic, and will eat your grout out! You'll get clean floor now but will have to replace later! Best to use something like Mr. Clean which is more neutral.

 Thanks for sharing that info. I don't have grout but I am sure it's useful for someone and who knows what flooring I will have in future.

 I used to work in the motel business and we used straight liquid dish soap and small brushes to clean the grout in the shower as well as the floors. It works like a charm on almost anything like that, but needs lots of rinsing. Vinegar could probably be used as long as it was rinsed right away because it doesn't eat anything immediately, as it's a mild acid as far as acids go. Still, I probably wouldn't advise anyone to use it, as in this case, I doubt it would do as good a job as dish soap. Bleach would be dangerous to the user as well, I'd think.

The best thing I have found to really clean grout is the window cleaner with ammonia from Dollar General and a wire brush.  The grout in this house was awful when I moved here and I tried everything to clean it.

Thanks for the tips. I was just wondering about how to clean some bathroom grout that had been neglected over the summer.