Disposals
Guys, don't be leary about using that disposal, with a reasonably lcear drain that disposal will actually help to keep those pipes clear. The disposal acts as a pump, forcing the water down the drain line. Hard things down the disposal(chicken bones, peach pits, nut shells) will scour the pipes.
what might help:
Fill the disposal side of the sink with water, if you have a double sink close the other side, then turn on the disposal and remove the stopper, allowing the disposal to pump the sink full of water thru the drain line. That may help clear things up some.