Avoid letting your hair go down the drain. That is the number one reason showers and sinks clog.  Consider putting a hair trap in your tub or shower and clean often.

1. Clean your drain using a small plastic “snake” you can buy at the hardware store if this is a hair clog. Click here to purchase on Amazon. 
2. You can also close the drain plug , fill the sink with really hot water, lift the drain cover and let water down. Do this 3 times. 
3. Use baking soda, vinegar and hot water. View video.
4. If all else fails, use a drain plunger. 
5. Do not use drano or drain cleaner, these damage pipes and can hurt you. 
6. If none of these work, call your landlord