How to Clean Bathroom Grout and Tile

Bathroom tile and grout trap moisture, soap scum, and mildew faster than any other surface in your home. Left untended, grout darkens and hardens, and tile develops that dull, grimy film that no amount of casual wiping fixes. The difference between a clean bathroom and a dingy one often comes down to this one surface—and the good news is that it's entirely in your control. This isn't about elbow grease alone; it's about understanding what you're fighting (soap buildup, mineral deposits, mold spores) and using the right tool for each type of dirt. Once you establish a rhythm—a weekly quick-clean and a monthly deep clean—your grout stays light and your tile actually shines.

1. Stop water before it pools. After your shower, use a squeegee or dry cloth to wipe down all tile surfaces while they're still wet. Work from top to bottom in long, overlapping strokes. Pay special attention to grout lines and corners where water pools. This single habit prevents soap scum, mineral deposits, and mold from setting in.
2. Move moisture out, mold out. Turn on the exhaust fan and open the window (if you have one) for at least 30 minutes after showers. Moisture trapped in the room feeds mold and mildew in grout. If your fan is weak or you don't have one, run it for an hour or crack the door open overnight.
3. Spray acid, wipe clean. Mix equal parts white vinegar and water in a spray bottle. Spray all tile surfaces and grout lines, let sit for 5 minutes, then wipe with a damp cloth or sponge. This removes soap scum and light mineral deposits before they harden. For the tub deck and shower floor, use the same solution but don't wipe—let it air dry.
4. Mix the deep-clean paste. In a small bowl, mix baking soda with just enough water to form a thick paste (about 3 parts baking soda to 1 part water). The paste should be spreadable but not runny. This is your monthly deep-clean paste.
5. Pack paste into every line. Using an old toothbrush, a grout brush, or a small nail brush, work the paste directly into the grout lines. Press the bristles into the line and move along it, coating every inch. Once all visible grout is covered, let the paste sit for 10–15 minutes. It will dry slightly as it sits.
6. Scrub grout lines aggressively. Wet your grout brush and scrub each grout line using firm, short back-and-forth strokes. Don't be gentle here—grout is harder than the brush bristles and won't be damaged. Work the brush along the full length of each line, paying extra attention to corners and where the tub meets the wall, where mildew collects. Scrub until the paste is mostly gone and the grout color begins to lighten.
7. Double-rinse to finish clean. Spray or wipe all grout and tile with clean water, using a damp cloth or the shower. Rinse twice—once to remove loose paste, once more to get residual baking soda. Baking soda left behind can dull grout and tile. Dry everything with a clean towel.
8. Acid conquers stubborn buildup. For grout that won't lighten with baking soda paste, spray full-strength white vinegar directly on the stain and let it sit for 20 minutes. The vinegar will begin to dissolve mineral deposits and some mold. Then scrub again with your grout brush. If that doesn't work, let the vinegar sit overnight (on a small section only, so you can monitor it), then scrub.
9. Polish tile surfaces until they shine. For tile faces (not grout lines), use a commercial bathroom cleaner like Scrubbing Bubbles, or stick with your vinegar-and-water spray for a natural option. Spray the cleaner, let it sit 5 minutes, then wipe with a sponge or cloth. For soap scum buildup on shower walls, the commercial cleaner works faster. For mineral deposits (hard water stains), vinegar is more effective.
10. Kill mold where it grows. If grout has black or green mold (not just discoloration), spray it with a 1:1 mix of white vinegar and water, or a diluted bleach solution (1 part bleach to 10 parts water). Let sit for 10 minutes. Scrub with a stiff brush. Bleach works faster on mold but is harsh and can discolor some grout over time, so use it sparingly. Vinegar is gentler and works well if given time.
11. Seal grout annually for life. Once grout is clean and dry, check if it's porous (water beads up on good grout; it soaks in on bad grout). If water absorbs into the grout instead of beading, apply a grout sealer according to the product instructions. This is a one-time annual job that makes the next 12 months of cleaning far easier.
12. Dry it down to perfection. After your final rinse, use a clean, dry microfiber cloth or towel to wipe down all tile and grout. This removes water droplets that would otherwise evaporate and leave mineral deposits (especially visible on dark grout). This step takes 3 minutes and makes a visible difference in appearance.