A standard dishwasher program uses 10 litres of water, compare that to dishwashers on an eco-setting which only use 7 litres.
Clean your dishwasher drains and filters to ensure efficient operation.
Let your dishes air dry; if you don’t have an automatic air-dry switch, turn off your dishwasher after the final rinse and prop the door open slightly so the dishes will dry faster.
Using fewer plates, dishes and utensils over the course of the day means less loads and more infrequent use of your dishwasher, saving energy, water, and detergent.
The percentage of the total energy required to heat the water in a dishwasher can be as much as 80%.
Pre-rinsing dishes before putting them in the dishwasher is mostly unnecessary. Modern dishwashers are very efficient and will remove all but the most stubborn food residue. Pre-rinse or soak only those items which won’t clean or don’t fit in the dishwasher.
Overloading your dishwasher can be detrimental by inhibiting the flow of water or stopping the revolving elements from turning.
Dishwasher detergents were the last product to include phosphates (now banned), which were very effective at removing stains and grease but cannot be removed from wastewater entering rivers and lakes. Phosphates can cause algal blooms in rivers leading to waterway blockages or even toxic contamination.