How to Clean kitchen sink drain?

Sprinkle some baking soda in the drain, pour vinegar over it until it stops bubbling, wait 5-10 minutes then run hot water, it should help.

Bleach will destroy any bacteria from food residue.

Pour bleach carefully into the drain so it doesn't splash onto counter or clothing. Let sit 15 min. Then run hot water to rinse bleach through the drain and pipes.

Boiled vinegar put bicarbinate of soda in plug hole and pour it down

Smelly? Pour 1/2 C. baking soda down drain. Then pour in 1/2 C. Real Lemon Juice and let it boil out the stink.

https://www.hometalk.com/diy/clean/bathroom/diy-drain-cleaner-1568453?r=2

I don’t know