Removing dried grout?

Yes there are grout haz removers.

Best to use one recommended for the specific grout that you used.

Check the manufactures website for detials.

Suphamic acid crystals work well. Mix with water and soak the area you want to remove. Give it about 5 minutes. Do not do this if the tile is a stone like marble, granite or travertine. There are cleaners made specifically for stone.

Thanks for the reply. The room was tiled before I bought the place. What is your thought on the acid?