Remove any visible debris from the drain opening
Pour boiling water slowly down the drain
Add baking soda into the drain
Pour vinegar into the drain
Let the mixture sit for 15 to 30 minutes
Flush the drain with hot water
Use a plunger if the drain is still slow
Remove and clean the sink stopper or drain cover
Use a drain snake to clear deeper clogs
Clean the drain opening and surrounding sink area with a brush and soap
Repeat the process if needed
Avoid pouring grease, coffee grounds, or food scraps down the sink