The easiest way for me is to manually remove them with a plastic tweezer. They are pretty easy to pop off, it's just time consuming. I have had no luck getting a critter to eat them, or with any of the things you inject or put on them.
Wait- are these the ones you got from me? lol. call or text me if you need pointers. Like I said- easy- just time consuming. If I'd had a quarantine tank I'd have kept them and popped them all off.