On Sat, 01 Jul 2006 09:20:48 -0700, Abe wrote:

If the ABS from the disposal is not pitched / slanted towards the
drain you could have water backing towards the disposal and sitting
in the pipe - hence rot/slime.
I would investigate and clean the pipes. Biggest part of the job is
getting everything out from under the sink, so one can work.

The slope is fine. Good thought though.

Dishwasher vent (top of sink) clogged???

Oren