Let the reaction sit for 15 to 30 minutes. If the clog is severe, leave it for an hour or even overnight.
Before you reach for the harsh chemical cleaners (you know, the ones that burn your nostrils and warn you not to touch the bottle), step away from the cupboard. unblock drain with baking soda
This is the secret step most people miss. Immediately cover the drain opening with a stopper or a damp rag. You want to trap the fizzing reaction inside the pipe so the pressure forces the clog to break up. Let the reaction sit for 15 to 30 minutes
You already have the best drain cleaner in your pantry: unblock drain with baking soda