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Originally Posted by Schooby  I've found the best thing for dirty grout is Kaboom (the regular spray with oxy, not the foam) and a grout brush. Just spray it and let it sit a minute then scrub  |
Yes, I agree, Kaboom is great and using a brush made for grout makes the work go much faster than a toothbrush would. When you have cleaned and rinsed, you should put on a grout sealer. You will know if you grout needs a sealer if water can penetrate and make it darker. Well sealed grout is easy to clean, dirt stays on the surface and doesn't seep into pores. It's also easy to seal grout yourself.