Baking soda and vinegar is weak against hair. Use a plastic drain snake (zip-it tool) or a bent wire hook for hair clogs, then follow with the baking soda method for grease/soap residue.
To keep drains fresh and flowing freely, do a mini-version once a month: 1/4 cup baking soda + 1/4 cup vinegar, wait 5 minutes, then flush with hot water. how to clear clogged drain with baking soda
Pour another kettle of boiling water down the drain to wash away the loosened debris. Method 2: Baking Soda and Salt for Heavy Grease Baking soda and vinegar is weak against hair
Sometimes a single treatment isn't enough. If the water is still draining slowly: wait 5 minutes
If your main line is blocked by roots, DIY methods will not work.