Steve,
Sue's probably got the cure. Your trap has bacteria in it, they all do. If it smells like rancid water (rotten eggs), then just a cap full of bleach in the trap will cure it. Let the bleach sit for a while in the trap.
HTH,
Ken
Ken & Tina in Riverside, Ca.
MOC-3237
'04 Dodge Ram 2500 Laramie SWB 2WD
5.9 Cummins 600 Turbo Diesel & Auto Trans 3.73 Diff.
--Pulling--
'05 Montana 3400RL w/ PullRite SuperGlide & Prodigy Brake Control
LA Marathon Runner,'03, '04 & '05, Training for LA Marathon 2007!