The kids is, well ignorant, the picture shows the drip pan from the rear of the freezing chamber which catches primarily excess lubricant from the drive shaft and seal. The lubricant is a petroleum jelly product and discolored from the friction of shaft against seal. My take is the kid was marginal or a troublemaker and posted to get even. In any case the cleaning of the drip tray was if I recall a weekly maintenance duty and had absolutely no contact with either raw or finished product whatsoever. But hey, it's Mcd's so whatever negative story no matter how absurd must be true. eh?