Updated: Oct 19, 2021
This method works depending on what’s causing the clog. Squeeze a bit of liquid dish soap in the bowl. About ¼ - ½ cup will do depending on the conditions. The soap helps whatever is causing the clog to slide free so give it a minute to settle.
Next add hot water to the bowl. Do not add boiling water. Water at boiling temperature may damage your toilet. Try pouring the water into the bowl from a height that will cause the soap liquid to form bubbles. This will also help the blockage to clear. Last step is to flush.
Credit to Hometalk