Our kitchen sink has an odor of death coming from it..I mean it smells bad, but not all the time, just once every few weeks. What can be done to prevent this? What could be causing it, trapped food? Water goes down just fine. I've tried baking soda and letting it sit in there, but to no avail. The pipes under the sink are plastic (PCV? or whatever they are called)
Many thanks for your suggestions, Chris