Remove any visible debris or hair from the drain opening
Pour boiling water slowly down the drain
Add baking soda into the drain
Pour vinegar down the drain
Let the mixture sit for 10 to 15 minutes
Flush the drain with hot water
Use a drain brush or pipe cleaner to remove buildup near the opening
Remove and clean the sink stopper if present
Unscrew and clean the drain trap if needed
Use a plunger if the drain is still slow
Repeat the cleaning process as needed
Avoid pouring grease, toothpaste clumps, or hair into the drain