We reside in Arizona and have lived in our house for 4 years and recently have developed an odor under the bathroom sink. We have taken everything out, cleaned it with bleach and lit candles, however, the odor remains. We do not have gas and I do not believe an animal died under the cement floor. We had a friend 6 months ago look at the plumbing. Everything was fine, he cleaned out the pipes. Can someone help?

We had a friend 6 months ago look at the plumbing. Everything was fine, This smell has been ongoing for 6 months? Can you describe the smell? Could it be sewer gas? Rotting hair? Something in the wall? What? Regards, Tom