Doing a load now before I go to work. Still had one of my knives clipped inside my pocket. I've done this several times and it never hurts the knife. Some of the worst ones I did was left a bunch of small self tapping screws in a pocket and that fucked up my dryer but it was under warranty and the guy was cool and fixed it no charge. Also I save concert ticket stubs and once in awhile I'll send one of them thru the wash and that really pissed me off.