I'm in the process of hunting down a water line issue because of tiny, misshapen ice cubes. Water on door flows hard, so I think it's in the icemaker.

Regrettably, I can't get the ice maker out because the white plastic piece in the lower left of my picture is blocking it. I was advised that it can be freed up by putting a screwdriver in the hole where I have the arrow pointing to, but I've had no luck so far.

Any help would be much appreciated, as cocktail season is fast approaching.

Much thanks in advance.