Allow the mixture to sit for (for stubborn clogs). The chemical reaction needs time to break down the clog. Do not flush during this time.
Check the water level inside the toilet bowl. If the bowl is filled to the brim, use a small cup or bucket to remove excess water until it is roughly half full. The mixture needs physical contact with the drain area to work, and excessive water will dilute the ingredients. How to Unclog a Toilet: Step-by-Step Guide unblocking toilet with baking soda
Slowly pour into the bowl. You will see immediate fizzing and foaming. Allow the mixture to sit for (for stubborn clogs)
If the toilet bowl is nearly overflowing, bail out some water into a bucket. You want the water level to be low enough that adding baking soda and vinegar doesn't cause an immediate spill. Check the water level inside the toilet bowl
Here's a step-by-step guide to unclog your toilet using baking soda: