Doing laundry doesn’t have to drain your wallet or the planet. Try these smart, simple energy hacks that keep your home efficient year-round. Use Cold Water for Most Loads Modern detergents work great in cold water and can cut washing costs by up to 90%. Keep Filters and Vents Clear Airflow is everything. A blocked lint screen forces your dryer to work harder and longer. Dry Full Loads, Not Overloads Half-loads waste water and electricity. But overloading prevents proper tumb