I use the Hoover Floor Mate. Are your grout lines small?

Yes, my grout lines are small. Does this machine wash the floor or just sweep them.

It washes the floor and then you can pick up the water with it so it's dry immediately. You won't believe how dirty the water looks on the collection side of the tank. My only complaint is that it doesn't release much water (probably because you can use it on wood floors as well), but its the only thing that I have found that works for me. I tried the steam cleaner route and it just moves the dirt around. Go on Amazon and read the reviews on it and decide if you think it will work for you.