How to return with rid of odor surrounded by bathroom sink ? The odor is strong at the overflow holes that are in the...

The odor is strong at the overflow holes that are in the front nouns of the sink bowl. Is there something i can pour down in that that is sheltered and won't harm the sink or plumbing????
Answers:    Unscrew the "P" trap below the sink ( "U" shaped with a collar on both ends) on any end.

A bottle brush or possibly a rag can verbs the build up off the walls of the PVC piping. use any mode of cleaner

Your going to have a bit of wet spill when you separate the trap not much 2 cups.

When you put it back together don't forget the scrawny plastic compression rings on the pipe collars. )they are directional rings look at them when you take it apart as to how they are slid on the pipe)

Hand tighten them individual
Try bleach