After I shower, I like to squeegee water off the shower tiles so mold doesn't grow on the grout. I'd like to get most of the water off my plastic shower curtain too, but I need a life hack to accomplish that.
My shower has an exterior curtain that stays dry, and an interior curtain that gets wet, similar to this picture:
Also like the picture, we have a combination shower / tub, so the curtains hang over the side of the tub. The ends of the curtain rod are not in fixtures; they just press against the walls at the ends of the tub, so if I pull down on it, it will fall.
I've tried a few things to remove water:
Squeegee the curtain from the top down. This doesn't work well because the curtain is "wavy" and flimsy, and there is nothing behind it, so the squeegee doesn't press flatly against it. I can't hold the top and bottom of the curtain at the same time to make it taut.
Squeegee the curtain in horizontal strokes, while holding one edge to keep it somewhat taut. This kind of works, but not very well. It's awkward, too.
Grab the left and right edges of the curtain at about shoulder height, pull them in opposite directions to make the curtain somewhat taut, and shake it vertically. This removes some water, but not much.
Bring the left and right edges of the curtain to each other, press them together, and "wring" it from the top down. This does not remove much water either.