I know this has been discussed endlessly. I hadn't tried potato as a wetting agent until recently (thanks Alex Mustard) and it seemed to work well on a glass 9" dome. Today I tried potato on an 8.5" acrylic dome and it worked poorly; the wetting properties disappeared quickly.
I have used spit as a wetting agent in the past, and also Rainex and Lemon Pledge as beading agents.
For acrylic what are your favourite remedies for over/under droplets?
Spit seems to work well for my 8.5" acrylic - however, it won't work where there are small scratches at all, water will accumulate there.
I'm not sure if spit pre--dive and post-dive has the same effect though, I'd guess post-dive is more