I worked there in the old days when I was in high school (late 90's), and one of the most disgusting stories I have about a job is when I went to refill the orange juice dispenser machine, and a giant swarm of flies were all over and in the top of the machine. In the orange juice, all along the sides of the inside, and flying around like a small swarm when I opened it.

I yelped and stepped back. A manager rushed over to me, slammed the lid shut, and told me to not tell anyone.

I quit a couple weeks later.