Fold a towel lengthwise and use it to wrap her wings close to her body, but don't get it too tight or she can't breathe. That is what we do. I did it once by myself and that helped alot. And you don't slice across the pad, but cut around the scab all the way, sort of in at a 45 degree angle, then try to gently pull the scab out with the plug. If you're lucky, the entire thing will come out. Solidified infection will look like provolone cheese (white and opaque) as opposed to clear yellowish like the fat in her pad. You may have to squeeze the pad a bit after that to bring stuff up to the surface. Every one is a bit different and what happens one time may not happen the same way the next time. Have paper towels if you get bleeding.
Once we used some PVC pipe as a nest landing bar, but to keep it from being slippery, we put a length of non-skid tape on it, which, being like coarse sandpaper, caused the first case of bumblefoot here. So, remove anything rough. And I would not use treated wood on roosts. Splinters from that stuff will start some nasty infections.