Easy Grout Cleaning With Baking Soda Paste

Black, grimy grout lines make a whole floor look dirty — even right after you mop. Here's the fix we use, with stuff you already have under the sink.

What you need

• Baking soda
• A little water
• An old toothbrush or stiff brush
• A cloth or sponge

How to do it

1. Mix baking soda with just enough water to make a thick paste.
2. Spread the paste along the grout lines.
3. Scrub each line with the brush — the grime lifts right out.
4. Wipe clean with a damp cloth.

That's it. White lines, whole floor looks new again. For tougher stains, let the paste sit 10–15 minutes before scrubbing.

Want the full step-by-step guides? The Mark's Market DIY guides break down jobs like this with measurements, material lists, and pro tips — browse them in the shop.