Stained floor grout

Was it sealed early-on?

Yes. The installer sealed it as soon as possible.

...and the "gray and dingy" wasn't there when the grout was originally sealed?

No, not at all. It was beautiful.

You might try one of those steam cleaner things. Steam is a great tool to use to clean grout.

http://www.diychatroom.com/blogs/grout-sealers-life-misunderstandings-95/

When we has the steam cleaners out to do our carpets, we had them clean the grout too. It got about 80% of it clean. There were spots here and there they couldn't get clean.

klmeenan said:

When we has the steam cleaners out to do our carpets, we had them clean the grout too. It got about 80% of it clean. There were spots here and there they couldn't get clean.

Click to expand...

Try a product called Grout Renewal. It freshens up the color, revitalizes it. It may have a sealer built in, but frankly I can't remember, so read the label.

I used this on my floors, came out great. They can match any color and it seals it as well. You can even go dark to light or whatever if you want to change the color all together. It is easy to apply with a toothbrush or they sell and applicator. Fairly inexpensive too. They mix it fresh for you and ship it right out.

http://www.groutdye.com/