In the winter I dry clothes on radiators and on a clothes horse indoors. Everything dries fine and smells lovely when dry (of fabric softener).
Today has been a breezy mild day so I thought I would get the washing line up. My clothes smelled lovely coming out of the machine but once they had been on the line a couple of hours they had a weird musty smell. This happened last year too every single time I put washing out. It's driving me crazy. Any idea what could be causing it?