She opened her phone and typed a quick search: natural way to unblock drain.

The answer, it turned out, was already in her pantry.

First, she boiled a kettle of water and poured it directly down the drain. This was just to warm the pipes and loosen the top layer of grime.

Maya let the volcano foam and dance for a full fifteen minutes. She used the time to clean the countertops, smiling at the gentle, safe sound of science at work.

Next, she sprinkled a full cup of — that humble orange box she used for cookies and absorbing fridge smells — straight into the plughole. The fine white powder clung to the wet, greasy walls of the pipe like snow on a dirty road.

The science was simple, almost beautiful. A slow drain is usually clogged by a sticky mess of fat, grease, soap scum, and hair. Chemical cleaners use a violent, heat-generating reaction to melt through this sludge, but they also corrode pipes and poison water. Baking soda, however, works with a partner: common white vinegar.

Maya stared at the kitchen sink. The water, instead of swirling down the drain with its usual gurgle, sat in a murky, greasy puddle. A faint, sour smell rose from the black hole of the plughole. It was the third time this month.