Earlier today I realized that I had a major leak underneath my bathroom sink. It soon became clear that I would have to replace the entire pop-up drain assembly. After all the hardware was removed, I noticed that the area underneath the lip, where the emergency drain empties out was covered in mold.
Does this mean my drain has been malfunctioning for some time?
How can I prevent this from growing back.
Would it also be safe to assume that my emergency outflow channel is super moldy as well?