Save energy and reduce cost by making sure your tumble dryer is full and if possible do all your drying in one go.
Dry multiple loads back to back because the dryer takes time and energy to warm up to drying temperature (stop-and-start drying uses more energy).
Use auto-dry rather than a timed cycle, that way you won’t be using more energy than required.
Keep the dryer exhaust vent on the outside of the house clean and clear of cobwebs and lint. If the movable shutters are blocked they will allow cold air, heat and insects to enter the vent when the dryer is not operating, reducing efficiency.
Overloading the dryer lengthens drying time. Clothes should be dry in a maximum of 40 minutes to 1 hour.
If you use dryer sheets, take the lint filter out and wash it with hot soapy water and an old toothbrush at least every 6 months. Dryer sheets can coat the tumble dryer’s lint filter with an invisible film which can lead to lower dryer efficiency, a burned out heating unit and even a potential fire.
Don’t add wet clothes part way through a drying cycle, it will take much longer to fully dry all the items. If there isn’t space in the dryer it may be better to start by putting those fabrics that dry quicker on a clothes line or drying rack.