The vessel sink drains slowly mainly due to 2 reasons.
Vessel sink drains slowly how to repair.
The sink overflow is another place where debris and build up can collect over time.
How many times has your vessel sink drains started to stink.
If a sink is draining slowly and cleaning the drain does not seem to solve the problem it is a good idea to clean the overflow as well.
Drainage pipe is clogged and the mouth of the drain is too small when compared to the vessel sink.
The air that comes into the drain through the overflow helps water in the sink to drain faster.
If this happens chances are that the vessel sink also drains slowly.
If you have identified clogs to be the cause of a slow draining vessel sink you can try removing them by plugging the drain first and then filling the sink with hot water.
Once it has been filled fully unplug the sink and let the hot water drain into the clog.