Drano and similar chemical drain cleaners are formulated with harsh caustic ingredients like sodium hydroxide (lye), sodium silicate, and aluminum. They work by creating a high-heat chemical reaction to melt grease and hair.
Use a plunger or a plastic "zip-tie" drain snake to manually pull out hair and debris. For deeper clogs, a standard plumbing snake is the safest and most effective tool. can you use drano with a septic system