Sink Hole

How to clean a sink on top of the sink is something rotten down?
A week later there was a party and someone got sick in the sink, we still have a rotten smell from the drain, without leakage, but the smell is coming from the hole in the top of the pool. The recommendations on how to dispose the smell?
Let's jazz was a good idea, but I like to use tablets to wash dishes in the sink. the flow of hot water in the sink and drop a couple of racks for washing in the sink. Make sure that pills can not get dissolved, then run the hot water slowly into the hole to move over flow. The cleaning solution to disinfect and clean the sink.