Trimming can remove a few, but if they are stuck in the trichomes you're going to have a hard time.
Even if you just hang to dry, most of them will leave as soon as the plants starts shriveling in the 1st few days.
As soon as it's not food anymore, they leave, but there will be a bit of a mess left.
Depending on how bad it is, you can just cut the bits out that they are stuck in. If they've completely taken over, then you may have lost the battle.
Hopefully it's not too bad.