How do you best clean grout before recolor it it??

Grout Cleaner

Ingredients: 1/2 cup of baking soda, 1/4 cup of hydrogen peroxide, 1 tsp dish soap . I use Dawn

Directions: Mix together the baking soda, hydrogen peroxide, and dish soap. Spoon mixture onto grout, wait 5-10 minutes, scrub and rinse.

Why this combo works:

Baking soda is mildly abrasive so it helps to remove the dirt that is stuck in the porous grout surfaces without causing any damage.Hydrogen peroxide is a natural alternative to bleach that brightens and eliminates germs. Plus it is non-toxic and decomposes into water and oxygen.Dish washing detergent (used in Grout Cleaner #3) cuts through the greasy grime that gets tracked onto tile floors.

I find this helps:

Give the grout cleaner some dwell time. You’ll get the best results if you allow your favorite cleaner some time to work (also called dwell time) before you start scrubbing. When cleaning tile grout, let the cleaner sit on the surface for 5-10 minutes then scrub out the dirt.Use a small, firm brush to scrub grout lines. Grout is porous meaning it has minute spaces or holes that liquid can pass through. These tiny spaces are great traps for dirt and grime. Scrubbing grout with small firm brush will loosen this dirt making it easier to mop or wipe up. (I use a cheap toothbrush to scrub my grout.)Scrub first then mop. After scrubbing the grout clean give the entire tile floor a final once over with a mop (or damp cloth). Use warm water with a few drops of dish detergent or a gentle floor cleaner. This final swipe will rinse off any remaining grout cleaner and leave the entire floor shiny.

Muriatic acid wash should help clean grout. It works well on removing soot and stains from brick above a fireplace.

1. Remove surface dirt with hot water and a towel.
2. Mix together ½ cup baking soda, ¼ cup hydrogen peroxide, 1 tsp dish soap.
3. Spoon cleaning agents onto grout and let sit for 5-10 minutes.
4. Scrub the grout lines with a brush. ...
5. Wipe clean.

This is how I do it: How to Clean Grout

1. Remove surface dirt with hot water and a towel.
2. Mix together ½ cup baking soda, ¼ cup hydrogen peroxide, 1 tsp dish soap.
3. Spoon cleaning agents onto grout and let sit for 5-10 minutes.
4. Scrub the grout lines with a brush. ...
5. Wipe clean.

Hello, hope this helps you out.

Baking soda penetrates the porous surface of the grout without being overly abrasive and helps remove tough stains, hydrogen peroxide is basically a natural alternative to bleach that will clean and brighten almost any surface, and dish soap simply cuts through any type of grease or slime