How do I unclog a drain without harsh chemicals?

Pour boiling water down the drain first to loosen buildup. Then pour half a cup of baking soda followed by half a cup of white vinegar. Cover the drain and let it fizz for 15 to 20 minutes, then flush with more hot water. This works well for grease and soap clogs. For tougher clogs, use a drain snake or a plastic hair catcher tool to physically pull out debris, especially in bathroom drains where hair is usually the culprit. A plunger can also work if you create a tight seal over the drain and pump firmly several times. Regular maintenance with the baking soda and vinegar method monthly can help prevent future clogs.