I don't use my dryer much. Mainly towels, sheets and underwear. The rest goes in the airing cupboard or hangs in the utility room.
Was wondering though ( can't work the cost out for myself) whether it is more efficient to dry items like towels on a high heat for a shorter time or low heat for a longer time. The dryer seems to take 1/5-2 hours to dry a load of towels on low heat. Was actually wondering whether I should get the dryer checked to see if it is working properly.