I left some dishes in the sink for about a week. I noticed a large amount of drain flies in my apartment. I cleaned everything, poured boiling water down the drain two to three times. Then i placed baking soda and vinigar down the drain and let it set, i washed that out with boiling water as well. Ive kept the drain plugged since then to keep them out. I went and bought that PLUMBING PIPE SNAKE CLEARNER liquid that fizzes. I poured that down a day later let it sit for an hour, then cleaned it out with hot water while running the disposal. About two days later i finally unplugged the drain by taking out the stopper. Not even within twenty minutes about fiften drainflies filled up the surrounding area. I dont know what else to do... im freaking out because i can't even have company over at this point.