Here's another shoutout to the Flexisnake drain-unclogger, which I used this morning to remove a greasy bolus of hair and muck from the bathroom sink.
I keep Flexisnakes in all of our bathrooms, and use them frequently to pull out gross blobs of matted hair clogging the sink drains. It's kind of like a long pipe cleaner with a crank. You insert it in the drain and twist the handle. The hair wraps around it. It's $(removed) on Amazon.