Once you have that grout looking spic and span, you definitely don't want it to get grimy again. The point is to make things easier on yourself, and one sure way to accomplish this goal is to remove unnecessary cleaning from your life. So, do yourself a little favor and spread some silicone-based sealant on your nice, clean grout. And go ahead -- throw out your old grout-scrubbing brush while you're at it.
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