Stick mincing head and plates, cutter, worm screw as a whole into freezer for couple hours .... I also do strips as it feeds in without having to us plunger and you just repeat
I put bowl of meat ready to mince into freezer also for an hour tops ..to cool down ... then do clean up chopping boards work tops etc so starting next stage, your mincing with clesn set up
After an hour meat shiuld be well chilled not frozen and with frozen mincing head it keeps things colder for longer
Paul