In our climate, if you hang clothes out on the line for too long they tend to not dry, and they often get a musty smell. That's why I like to put everything through the dryer so we can have dry, fresh clothes all year round. Of course, with all the loads of laundry my dryer gets, it needs some help to keep up its efficiency. That's why I have to get my dryer serviced regularly; it helps my dryer work longer, and since it's more efficient, it saves us electricity because it doesn't lose as much hot air.