How can I fix cracks in tile and whiten them?

l don't think you can hide the crack. You can regrout the tiles with a nice white grout. Taking off these tile and replacing is pretty easy.

It’s not so easy in the sense of finding any tile that maarches! Thanks tho! As for the floor honeycombs, we have not found any effectI’ve way to whiten them. They need a whitening paste!

I used denture cleanser dissolved in water and a stiff Dollar Tree scrub brush in my bathroom. I scrubbed on hands and knees several tiles at a time, and then wiped with a wet towel. The results were great. I'm now working on foyer tiles, sprinkling with baking soda and dampening the scrub brush in water. I'm getting good results with that also, leading me to think that it's the hard work of scrubbing rather than the actual cleaning solution.

This may work for you: https://www.youtube.com/watch?v=qN8yr4HIeYc&feature=youtu.be

thank you, will try!

If the wall tiles are porcelain, try a porcelain tile "fix kit." Home Depot and other big box retailers sell a repair kit for about $26, True Value online offers "porcelain filler and repair" (1 oz) for $7. You can whiten the grout with a white grout pen after using a bathroom cleaning product to get the grout as clean as possible. After using the whitening pen, I would reseal the grout. for the marble floors - I'll let somebody else answer that! P.S. Have you considered regrouting with a darker grout, such as black? That way, keeping super white grout clean isn't an issue.