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Posted By: Truly Free Home
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Posted On: 2/25/2026
To deep clean your grout lines without toxic fumes, all you need is oxygen bleach and warm water.
Prep: Sweep or vacuum the floor (skip this for shower grout).
Apply: Spray the grout lines with warm water.
Treat: Sprinkle oxygen bleach over the wet grout.
Dwell: Let it sit for 20 minutes.
Agitate: Scrub with a brush, wipe grout clean with a damp, eco-friendly cloth.
Before you start, sweep or vacuum the floor to pick up loose dirt and debris. This keeps you from just smearing grime around while you scrub and gives the oxygen bleach direct contact with the grout. If you're cleaning tile grout in a shower, no prep needed. Then, it’s time to get cleaning.
Fill your spray bottle with warm water and spray the grout lines thoroughly. You want the grout fully wet so the oxygen bleach activates when it hits the surface. Cover every section you plan to clean.
Take about one to two scoops of oxygen bleach and sprinkle it evenly over the wet grout lines. For shower grout on vertical surfaces, apply it to a damp sponge first and press it onto the grout lines for better coverage.
Walk away for about 20 minutes. The oxygen bleach needs time to penetrate into the grout lines and break down the buildup. The oxygen release does most of the work for you, so give it the full dwell time before you start scrubbing.
Grab your grout brush or a toothbrush and scrub the lines using firm, back-and-forth motions. Soon, you’ll see dirt and discoloration start to lift. The oxygen bleach has already loosened everything, so this part goes faster than you'd expect.
Wipe up any excess oxygen bleach or grime with a wet cloth and give the whole area a good rinse to get rid of any remaining residue. If you're doing floor grout, a quick mop afterward gives you a clean, finished look.
Take a second and look at the difference. Clean grout lines change the whole room.
Work in small sections instead of doing the whole floor or shower at once. It's less messy and makes sure each area gets the full 20 minutes of dwell time.
For floor grout, always mop after scrubbing and rinsing. It picks up anything you missed and finishes things off.
Traditional grout cleaners use chlorine bleach or harsh acids to strip away discoloration. They work, but they also produce strong fumes and aren't ideal to use around kids or pets.
Oxygen bleach grout cleaner works differently. When sodium percarbonate dissolves in water, it releases oxygen that penetrates the grout’s porous surface and lifts dirt, mold, and stains from the inside out. This non-toxic cleaner also doesn’t emit toxic fumes or leave behind harmful residue—and it's color-safe, so it won't affect your tile.
Grout is porous by nature; it absorbs dirt, grease, and moisture over time, which is why it discolors even in homes that are cleaned regularly. Surface-level wiping doesn't reach what's settled into those pores. The 20-minute dwell time gives oxygen bleach enough time to go beyond the surface and do what a quick spray and wipe can't.
No matter what, grout picks up dirt and oils over time. But if you use this oxygen bleach method every couple of months, each round gets easier because you're never letting the buildup get ahead of you. That’s why it’s a good idea to always have Truly Free Home OxyBoost on hand. Grout that's maintained regularly takes half the effort to clean compared to grout that's been ignored for six months.
Between deep cleans, wipe down grout lines in high-traffic areas or damp spaces like showers once a week to keep dirt and grime from getting away from you.
