Here's a great tip for a simple shower drain cleaning. Shower drain clogs are usually a result of hair in the drain, and it will stop up the drain like a cork. Here's what you can do. You'll need to remove the screws and drain cover, then:
1. Take a simple screw driver (flat preferred), and an old toothbrush. Tape them together as shown. Be liberal with the tape, as you want it to hold.