By Ariane Sohrabi-Shiraz Drying clothes in winter can be tricky, because tumble dryers are expensive to run, it’s too cold to hang them outside, and leaving them to dry inside risks causing damp and mould. The tumble dryer is the most expensive household appliance to run, with the average cost to run one a whopping £200 a year. And with Ofgem’s new price cap coming into force on January 1, which will see many household’s energy bills becoming more expensive, people are looking at ways to wave money. But the alternative to a tumble dryer is hanging clothes up to dry – which in winter can be ris…