Shower Drain screen removal

[Scott Blackman]

So I need to get behind this drain to clean better. I’m assuming screws out of course. Will spray with CLR. Should I twist it out or pull straight up? Not threaded is it? Not real thrilled with this question at all either.

 

[Breplum]

Straight up. CLR won't do anything. Screws love to escape into the hole...watch out!