Bad Smell from Under Bathroom Sink

[rames14]

George -

I would bet you have a Washer/Dryer prep that you don't use. If so, take a bucket and open the hot and cold water faucets into the bucket. Don't gag, as it will probably be much worse than the smell you are already getting. Once flushed, your odor problem should be gone. Hope this helps, it did for us.