I used to use my teeth on the nib Haha. But now I have found out (today may I add) that a small flat head, the one I use for screws in my RDA, a twist and it pops off.
But yes I think that's one of those unasked questions that arent as stupid as they sound! This is like a question for Mr J O'B for vaping lol.
And wicking... I thinks its trial and error, too much and it floods, too little and you get dry hits. But I dont use tanks, the only one I have built has been perfect, more luck than judgment I will add