My AC was making a weird noise, so I took a look at the filter. It was toast.
As a result of a clogged filter, I had a frozen system that needed to thaw.
After thawing the drain was filling with this gunk that I could not seem to get out of the drain pan.
To clean out the gunk I invented the Cajun Crud Catcher attachment. This attaches to any wet vac system, and replacement parts are available over the counter at any hardware store.