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Happy Valentine's Day! Enjoy the day and make sure to spread some love.
I grew up in Germany, and my mother (or more accurately, our German housekeeper), would open the windows every morning, called lüften. Lüften is a traditional German practice of briefly but fully opening windows and doors once or twice daily to exchange stale indoor air with fresh air. Also known as "house burping" or shock ventilation, this 5–10 minute routine prevents mold growth, boosts air quality, and improves sleep and mood, regardless of outside temperatures.
