I pulled the ones out of my PD50’s by heating carb body with a hot air gun. Wrapped a pice of rubber tube around the jet and it pulled out pretty easy.
I thought this was a good start point, and obviously avoids potential damage.
Failing that though, a good mechanical grip, if they are very resistant, will be of value to get them moving.
Those knipex twingrip are a good tool to have anyway if you've something that's already been compromised. My son bought my pair recently for a birthday present as I'd been looking at them in a tool shop. Positively surprised at just how good they grip in comparison to some of my old and quite well used tools. Quite a neat size to carry in an emergency tool pack as contingency as they can be set to open quite wide in accommodation of different components.