7. I thought the sun dries the clothes and linen!

No the sun damages fibres and bleaches clothes. You could put your clothes in an air tight container in the sun for a week and they would still be wet and mouldy as well. Air dries clothes and linen so when clothes are hung on the line under a CLEVACOVER clothesline cover they will dry because there is always air around. Please be aware that the drying time differs depending on the season.