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Question:

Black gunk in bathroom sink?

My bathroom sink has been clogged for a while, so I tried to use a wire hanger to unclog it. Mistake. It got stuck. I managed to get it out after a bit, but now it's completely clogged with this black stuff. It doesn't smell and is squishy. What is it? Did I completely ruin the sink..?

Answer:

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Your p trap is clogged and you need to put chemicals down it to release it.
that is crud. Crud= any solid debris that go down your drain and then are held mutually via moist sticky drinks or glop. Hair, epidermis flakes, makeup powder, nutrition debris from teethe brushing, tooth brush bristles that are all gumped mutually via sticky stuff like, tooth paste, saliva, face oils, face creams and hand soaps.
Your sink is probably OK, just a little dirty The black stuff is soap, grease, hair and whatnot. Go down the hardware and get a plumber's helper which is a thing like a big rubber suction cup on a short handle. Also called a force cup or plunger. See the gizmo with the red rubber cup in the source. Nice and cheap and reusable. Place the cup over the drain and hold it there while you run a little water into the sink - no more than 1 inch (2.5cm) deep. Push the handle up and down until the blockage eases. When it starts to drain, add a little more water and keep doing it. Once the drain is working OK, put in a good shot of laundry detergent and hot water and leave it there a while, overnight would be good but an hour or so is OK, then use the cup again to clear out anything that has loosened. If you use the plunger every now and then the drains will stay pretty well clear.
I don't know what the black stuff is, probably sludge of some kind. What you are missing is that the plumbing gives you another shot at a clogged sink from underneath. With tools, it is possible to remove the entire U for cleaning and there is also a drain plug on a lot of them. Whatever you do, don't resort to a chemical . It never works on a real clog and then you have a Haz-Mat site. A real snake would work better than a coat hanger.

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