We have had an increasingly horrible smell flowing from the left side of our kitchen sink (the opposite side of our disposal). I read on the internet about the trap and it’s need for water, but now even water doesn’t help. I’ve poured drain cleaner, bleach and ammonia down the drain and nothing helps. I now just keep it plugged up, but I know this will not fix the problem. What should I do now? Thanks in advance!
To add to what “Retired plbg” said, when you do the final rinse, use a pot of boiling water, not just hot water from the sink, but a pan of water that has been at a rolling boil. This will help to clean out the pipe.