This classic science-fair volcano creates carbon dioxide bubbles that agitate and dislodge soft clogs like food particles or hair.
A wire coat hanger can be used to try and dislodge the clog manually. plunge sink without plunger
Sometimes, hot water can dissolve the clog. plunge sink without plunger
As a last resort, you can use chemical drain cleaners. Be cautious, as these can damage pipes and are not environmentally friendly. plunge sink without plunger