Please help as I am at the end of my rope and up to my ears in unwashed dishes!! My husband took apart the disposal, snaked the drain and still, nothing. Whenever you turn on the disposal to get rid of the water in the sink, it just spins it down and once shut off, pushes water back into the sink. If you leave the water in the sink, it eventually goes down. Please help as I am losing it!! THanks in advance.