You mean the washer sticks to the knock out pin? then if you use the air blow it shoots the part into oblivion?
If that is the case Ive run some small parts that like to shoot all over the machine. I'll take some thin yet rigid plastic sheeting and create a little cubicle to contain the parts when they shoot out. If your citizen has the arm that extends then you probably cant do this... If your material is magnetic you can put a strong magnet in the basket to attract the part. Ive done that too. Just clear out your basket before they pile up and jam up the arm. If you're not making too many you might just want to pick them out of the chips.
CNC Product Manager / Training Consultant