What are the contents of most sink drain clogs?

I don’t clip my fingernails, and I don’t think they would turn rubbery in any case.

Might be. I am just amazed at the consistency (I’m serious - it really IS rubbery).

I’ve got one. That’s how I resolve the problem. I know about the vent and no, it is not easy to plunge out if my sink gets really gunked up. In fact I now have two plungers - I lent my first one to a friend so she could clear her kitchen sink and I got paranoid that I would have a toilet clog before she returned it (haven’t figured out why my toilet likes to clog so often either).

A lot of it is toothpaste, which is why I now spit into the trash can, rather than the sink. Just that one change caused the “clog frequency” in my bathroom to go down over 50%.

What I’ve always wondered is why certain types of clogs happen in the first place. It doesn’t compute in my head as to how, say in the kitchen, random bits of food eventually stops the sink up (grease, I understand, since it cannot “mingle” with water). Shouldn’t they just go where the water’s going and end up in the city’s WTPs?

Could be some fungus gnat or fruit fly larva in there too; sometimes especially in summer you may notice small flies going in and out of the drain.

Occasionally, taking the boiling water from cooking a big pot of pasta and carrying it to the bathroom sink and pouring it down that drain will help a lot in keeping down the frequency of clogs.

That’s one of the smartest suggestions I’ve heard all day.