Smelly sink drain
In a home I just moved in to, I found one of the bathroom sinks was draining very slowly. After cleaning out the trap and finding a lot of hair in it, I used a Draino on it according to the directions. Now, it drains faster than the 2nd sink, but when I put my face close to it, it has an odor. It's not a sewer smell, and dosen't smell like Draino, perhaps left overs from what the Draino cleaned up. What is the best way to get rid of the smell?