Teh Eww

I am so grossed out. I was just cleaning the sink and on a whim I stuck a fork into the little spaces between the rubber flaps on my garbage disposal.
Black gunk came out on the fork. I scraped along the underside of a flap. More black gunk. I lifted up the flap and OMG there was like a half inch+ of black sludge/goo/slime stuck underneath each flap. Pretty sure I didn't accumulate that all by my lonesome, so there is OTHER PEOPLE'S SLUDGE IN MY SINK!
*gag*