What is on my shower drain and why is my shower not draining?
I have one of those that I have to unscrew then unscrew the drain itself, notice the hairs on the cross bars as you remove the drain assembly. Don’t break those hairs just unscrew the lower section and lift it up. What you wipe probably find is a wad of hair and soap scum. YUK! My wife daughters and most of my grand daughters have long hair, when they shower some goes down the drain so I have to do this several times a year. I haven’t needed a snake and you might not either, it is gross but only takes a few minutes. My drain has an o-ring seal but in the past I had to roll a bead of plumbers putty to seal the flange when re installing. I have a wrench to pull the flange but have used heavy duty needle nose pliers in the past. I would recommend pulling it out with this method because a drain cleaner won’t dissolve the entire hair ball and it may break loose and lodge lower in the plumbing and then a snake would be needed. Give removal a try , it’s gross but usually works.