cleaning hex tile grout?
A previous owner put in a hex tile bathroom floor and while the style is great, the grout looks dirty and discolored in various spots. Other places it is still nice and white which only shows how dirty other spots look. I found something called Polyblend Grout Renew but that was for larger tiles, not (what seems like) thousands of grout lines around tiny hex tiles. Would I really have to apply a product to each grout line?
I have tried various cleaning household products, a scrub brush, elbow grease, oxyclean, etc. Nothing really whitened it that well.
Any ideas? This is what our tile looks like
Here is a link that might be useful: Grout Renew