She knelt and heard it: a deep, crackling, whispering sound, like a thousand tiny workers scrubbing the inside of the pipe. The chemical reaction was creating carbon dioxide bubbles that agitated and dislodged the sludge.
“Now,” he said, “the vinegar.”
“The drain again?” he asked.
Together, they walked to the bathroom. Mr. Kostas instructed her to pour the entire half-cup of baking soda directly into the drain hole, using a butter knife to push any stray powder past the metal grate. how to unclog drains with baking soda
Over the next year, Sarah became something of a drain whisperer in her building. She taught the family on the second floor how to clear their kitchen sink of bacon grease. She helped the students in 4B rescue their shower drain from a terrifying wad of hair and conditioner. She even wrote a short guide and taped it to the laundry room wall: She knelt and heard it: a deep, crackling,