Throw it away. I mow all of my trim and leaves and toss it into the green waste with the lawn clippings. Or throw it over your neighbors fence and call the cops on them.
I've never hosed mine after pollinating, I just cut that branch off at the bottom after I get what I need. I haven't had any cross pollination with this method yet.
You can cut a bunch off, just dont cut them all off. Remove any in that impede air flow like Nizza said.
Leaves are how your plant takes in the light so you need them. I cut the shit out of mine a few times through out the grow. Just to keep the circulation up.
Attitude are not scammers. Only down side to them is when they offer those shit tier Barney farms in their monthly Promo's. Speaking of attitude, does anyone have any good recommendation for a og from them? Cali con has a grape og I've been looking at, but it's Cali con so...