The best washer-dryers do a near-perfect job of washing your clothes and when switched to drying mode, they will dry laundry accurately and evenly. But the worst we’ve seen – and there are plenty out there – are just plain bad at the two jobs they’re designed to do. This means that if you pick the wrong dryer, wash-day could become a nightmare. Find out what you need to look for when making your selection with our washer-dryers buying guide.