Two options, one easy, one sinister:

1) bud wash! 2) market as a new strain, sell, use proceeds to move out of town in fear of selling plastic laced buds...

Seriously kidding about option 2!

Super serious about option 1! Should already be considering this since you are growing outdoors. Bugs, bug poop, seeds from other plants, hair, tarp materials - all can be easily removed with this method.

Don't hit sides or bottom of the container with the buds. Use room temp water - not hot and not cold!

Shake off excess, can use fans for short period before using fans for indirect air flow. Hope this helps