You should not apply cleaners with bleach or ammonia to tile, as it can discolor the grout over time. A mild all-purpose cleaner should do the job nicely. Or, use a cleaner recommended by your tile manufacturer.

Does bleach damage tile and grout?

Using bleach to clean your colored grout can result in fading of the color, making it uneven, or even removing the cover if the bleach isn’t handled properly. Using bleach on colored grout should really be avoided. Bleach can also weaken the grout, causing it to crack and crumble.

How do you bleach floor tile grout?

Mix up a solution of about 3 tablespoons powdered oxygen bleach (something like OxiClean would work) and warm water in a 2-gallon bucket. With a sponge or cloth, swipe it around the surface until the grout lines are full. Let it soak in for at least 15 minutes, then rinse well with clean water.