You dont always need a plumber to fix your drain holes or to unclog your kitchen sink.
Sometimes, you only need a little science and some chemical reaction!
You only need baking soda and white vinegar to do its magic on your clogged kitchen sink.

Image credits: Pan The Organizer via Youtube
Learn this by watching the tutorial below.
Pour one pot of boiling water down the kitchen sink drain.
Next, pour one cup of baking soda also down the kitchen sink drain.

Let it sit for roughly five to ten minutes.
After this, pour one cup of white vinegar down the kitchen sink drain as well.
Let it sit for another five to ten minutes.

After ten minutes, add another pot of boiling water down the kitchen sink drain.