Earlier quoted context omitted.
Can’t you get capacitance with a wet sponge? Like your typical dish cellulose sponge. You could make a small platform?
I remember drawing on my old iPad back in the day by shoving a wet q-tip into a BIC pen and using it as a stylus. I am sure something similar could be rigged here
It's the reason why I love Note and S Ultra phones - the stylus. I'm using it now.