Blocked drains are a common problem that can cause serious issues if not addressed quickly. This guide covers both DIY solutions and when to call in the professionals.DIY MethodsBoiling WaterPour boiling water down the drain to dissolve grease and soap buildup. This works best for minor blockages.Baking Soda and VinegarMix equal parts baking soda and vinegar, pour down the drain, and let it sit for 30 minutes before flushing with hot water.PlungerUse a plunger with a good seal around the drain. Push and pull vigorously for 30 seconds.