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Does anybody have any tips on clearing a clog in a bathroom sink vent/overflow holes? Just for clarity, I'm talking about the holes closest to you when washing your hands.

I got drain cleaning tools and shoved them in the hole...but it wasn't super effective. I was able to clear the main drain, so that's a plus.

Does anybody have any tips on clearing a clog in a bathroom sink vent/overflow holes? Just for clarity, I'm talking about the holes closest to you when washing your hands. I got drain cleaning tools and shoved them in the hole...but it wasn't super effective. I was able to clear the main drain, so that's a plus.

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Nice! I'm glad it worked for you. Peroxide is very effective at breaking up biofilms, toothpaste, (biological) laundry stains. Once peroxide is done fizzing it becomes water, so I've been using it to deep clean kitchen gadgets too.