scrupping grout with toothbrush dipped in vinegar
Photo: Wendell Weber
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8. Whiten Grout

For stubborn stains on ceramic-tile surfaces, scrub grout with a stiff-bristled toothbrush dipped in vinegar and watch it whiten before your eyes.

CAUTION: Vinegar can harm marble and other natural stone surfaces, so avoid using on these materials. Test a small, unobtrusive area first if you want to be extra careful.
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