Most people use a plunger incorrectly. You need a flange plunger (the one with the extra rubber lip that folds inward). Do not just push down hard. Push down gently to seat the rubber, then pull up sharply. The suction on the up-pull is what dislodges most clogs.
Here is why you should never pour drain cleaner down a blocked toilet—and what you should do instead. Most drain cleaners rely on a heavy concentration of sodium hydroxide (lye) or sulfuric acid. These chemicals work by generating intense heat to melt organic matter (like hair and soap scum). drain cleaner for blocked toilet
The chemical sits on top of the solid mass, fizzes a bit, and then just sits there. You have now replaced a mechanical clog with a chemical-and-waste-soup clog. Think about the ergonomics of a toilet. You have to lean over a bowl of standing water to pour a chemical in. If that chemical hits the water and reacts violently, or if the plunger slips, you risk splashing lye or acid onto your skin, eyes, or clothes. These burns happen instantly and are severe. Plumbers have horror stories about rushed ER visits caused by DIY drain cleaner mishaps. You Become a Hazard to Your Plumber Let’s say you try the chemical, it doesn’t work, and you finally call a professional plumber (which you should have done first). The plumber will arrive with a heavy-duty snake or a hydro-jetter. Most people use a plunger incorrectly