Scissors, razor, hands. You can cut it or just yank it off, but it tends to leave little pieces behind that regrow. You can try to slowly peel it off with a finger and get most of it off.
If you can pull the whole rock of it out try pulling it out and than hold it upside down over a bucket and slowly peel the stalks off one by one.
Wear gloves, Xenia STINK and it is almost impossible to wash the smell away so gloves are a good idea.