Sodium hydroxide aka Draino, does a quick job of unblocking clogged sinks because the process involves a chemical reaction. Buy the product in crystals so you do not have to worry about spills.
If you love cleaning your house using organic methods you cannot go wrong with hot water. This method is ideal for sinks that do not have too much material clogging their system.
The combination of baking soda and vinegar makes excellent cleaning supplies that can be used almost anywhere inside the house. Pour hot/boiling water into the drain and add half a cup of baking soda.
This is another easy and natural way of unclogging the drain. Bring 2 liters of water to a boil and add the dish soap. Pour the mixture down the drain. The mixture warms the grease clog to a liquid, allowing it to flow freely out of the drain.
Mix a cup of hydrogen peroxide with a spoonful of baking soda. You will hear a fizzling sound once you pour the contents down the drain. Leave for a few minutes before flushing with cold water.
Use a cup plunger to force the grease down the drain. If the drain is fully clogged remove the drain stopper and fill the sink with water. Plunge the drain hole using the same motion as you would with a toilet.
Sometimes the sink could be blocked by material such as hair and pieces of clothing that can be a pain to remove. Straighten the hanger and create a hook at the end.