Are you saying that sweating prefusably on an indoor cycling trainer is not a common problem? I must be misunderstanding.
I'd need to have a couple of these absorbant interchangable sweat pads for an hours workout if I wanted this thing to have any chance of staying in place. And cleaning it afterwards would be a must, even so it sounds absolutely grim after a few uses. Plus they are pretty uncomfortable (my experience). I suppose it might be tolerable if I was just lightly spinning through a magical VR world enjoying the views. But I'd rather be using regular Zwift and getting fit.