We use the plastic drywall/putty knives, and do round the corners. I'd bet the metal ones work better
and are probably easier to clean but I don't know how we wouldn't rip screens with them around here.
Drop one and you're done son.
I'm largely interested in reducing chemical and water usage as well as exposure to the screen dude.
Greg's video the other day was eye opening in that regard, more akin to how I use to clean flatstock
screens rather than textile.
Do automatic screen reclaim machines actually work? It seems like that would be the area to invest in...