@HarleyKelvin,
Regular dosages of vinegar and baking soda. Do it every other week and you should be fine.
Also use a drain sieve to prevent large food particles, hair, rings, plastic bits, straws, chopsticks, etc. etc. from going in the pipes. And never pour grease down there....use a can for that.
Flush the drain with hot water.... As in BOILING water, a gallon of it.
add 1/2 cup Baking Soda, then a combination of 1/2-cup each of vinegar and boiling water, let it sit for a while, oh say, 15 minutes, then flush with more boiling water. Then run hot water for several minutes.
If the clog is too severe, you may want to call in a licensed plumber.