To make a long story short I live in an Apartment and haven't washed my dishes for awhile. I put them into the sink to soak for a few days, but when I took them out the sink was still clogged. I cleaned any food that might be stuck out, but then I noticed that something that smelled funky and appeared as black goo and tiny bits of bile came up. Should I just use some type of declogger or is it much more serious? It's in the garbage disposal side of the sink. Please help.