I work a shift as a cook's assistant here in the college dining hall, and one of my jobs is to clean out the ice cream machine, wash the parts, and put it back together (it's one of those big machines that has three "spigots"--two flavors and twist). This involves flushing out the chambers with cold water, removing the front panel with the spigots on it, pulling out the mixing blades, and then reaching through to the back of the machine to pull out the pegs that turn the blades.
One day, after the machine had been worked on but still wasn't working properly (although nobody told me this), I went to clean it. When I started to take it apart, I found that the side that mixes the chocolate was still full of clotted mix. I had to scoop it out as best I could and then reach--full arm's length--through to get the peg. I felt like James Herriot with his arm in a cow and came out covered to the shoulder in stale ice-cream mix.