He needed heat. He ran to the kitchen again, filled a bucket with hot water—not boiling, lest he crack the cold porcelain bowl—and hurried back.
Baking soda (a base) and vinegar (an acid) create a fizzing reaction that produces carbon dioxide gas. This agitation helps dislodge soft clogs, while the mild abrasiveness of baking soda can break down residue. baking soda to unclog toilet