Betcha you sign that song for the rest of the day! You're welcome. You are even more welcome for what is next. If you have a weak stomach, you may want to stop reading now. But seriously, this will save you money on a plumber for sure! (And no, I am not getting paid for my opinion. This is my totally unbiased experience.)
So I do not think that the drain to our bathtub has been cleaned in years. It is an older house, so I was chalking that up to why our tub usually held about 3-4 inches of water when you shower. Or it drains really slow after a bath, thus leaving a lovely scum buildup. Seriously, we could scrub it and a day or two later it would look like we never did. Nasty! Just to keep it real (and personal), here is a good example. I shed a lot, so my hair catches on the drain all the time too. Anyway, gross, I know.