Matt Muenster and Sarah are working together to find big savings in one of the smallest rooms in the house. And while tackling grass stains is hard work, saving energy and money on laundry day couldn’t be easier.

After all, over 90% of the energy used to wash clothes is used to heat the water. Washing with cold water (and cold water detergent) can get your clothes just as clean — while only costing 4¢ per load.

Making other small changes like only washing full loads of laundry and setting your dryer to auto-dry can help your savings pile up as fast as your laundry seems to.