Ask Who Cleans AC Filters — Dirty Filters Hide in Summer — Sep 06

Ask Who Cleans AC Filters sounds like a micro-optimization until you are at the Panda Base gift shop where everyone buys the same bamboo hat.

Someone in our WeChat building group once ordered 'medium' spice and cried politely in front of coworkers. The fix took less time than telling the story.

Try this once: write the rule on your phone lock screen for three days. If it survives, it is yours.

Your mileage may vary.