Or.... its like saving change in a penny jar and then bustin it out for a special occasionAlcohol.
Personally i remove the screen from every grinder i have. Can't see any logical point in it. You're just removing THC from your weed. Kinda similar to just rolling two small joints from a bud instead of a nice big one.
Nope ........ as long as you don't mean the rounded tip small onesTry sticking it in the freezer over night then giving it a good whack on a table, clean with an old toothbrush and alcohol.
Edit: Am I the only one here who uses scissors still?