Teddahlia I use scalpel for first one and fingers for the rest.
Just curious - is there a reason to pick a scalpel over a utility knife?
I use one of those breakaway utility knives and just discard the break-awayed piece after every cut instead of sanitizing. I guess it’s a bit wasteful, but it’s a pretty tiny piece of metal and super cheap. (Plus, I only do around fifty cuttings a year, so I’m still working on my first box of blades)