Bathtub drain smells sour. What will work?
The bathtub drain had been draining slowly and smelled sour. I removed the strainer, and pulled WADS of slimy hair out of the drain. The water drains smoothly now, so I think I got at least most of the hair.
I’ve tried bleach, but the smell returned immediately after the shower stopped running. Also tried baking soda and vinegar. Smell stopped only as long as I ran water down the drain. This seems strange and suggests that the water is masking the smell and the steps I have taken have not remedied the problem at all. Drains are a major headache to me particularly those in the region of the bathroom.
1) What could it be?
2) How to kill the smell for good?