A (one with an extra rubber flap at the bottom) is the most effective tool for toilets. How to Unclog a Toilet On Your Own | Drano® Expert Advice
If the clog is stubborn and further down the pipe, you need a tool to break it up physically. unclog toilet drain
After discovering a clog, do not flush again. A second flush will almost certainly cause the bowl to overflow, turning a contained problem into a flooded bathroom. A (one with an extra rubber flap at