Yeah if you're meant to be erect or flaccid then that's true for cut or uncut.
I say dry jelqs but i use lube anyway to make myself more comftortable while doing so, since the skin rides up regardless it's still essentially just a dry jelq, to try and keep the effectiveness of wet jelqs i kegel to keep blood in the penis after i try and re-grip after each jelq & then do occasional really long & slow & intense ones, the intensity of these ones seem to help me stay at a hardness that's appropriate. That's just how i do, you should experiment and see if you can get a way that's best for you.
How old are you btw? When i was attempting Penis Enlargement a couple of years ago i couldnt stay soft for shit, had to wait for my penis to calm down after every stretch out/left/right & same for jelqs because they need to be semi-~. Try masturbating before warming up before stretches, helps a lot.