I can't get the injector access screw off my Remora skimmer to clean the
injector. The skimmer is no longer producing much foam, and operates with a
slight hissing noise that is new. The trouble is that the screw is just a
very soft piece of plastic and it appears to be stuck. I can't put much
torque on the screwdriver or it just deforms the head of the screw. I tried
to grasp the screw around the edges with a pair of plyers, but again it just
deforms. The screw just won't budge.

Any tips?

Thanks in advance.

Regards,

Dave.