Upstairs, bask in the quilt doesn't accept rain at night during the day. Is it good for downstairs?

Upstairs, bask in the quilt doesn't receive rain at night during the day, which is bad for downstairs. There is night dew in bask in the quilt at night, and morning dew will make the quilt very wet. In addition, the dust in the air will fall on the quilt, which is easy to dry the next day, dirty and easy to breed bacteria. Quilts can't be dried for too long, and ultraviolet rays in the sun will also oxidize germs into cellulose in the quilt, which will reduce the warmth of the quilt and the sunshine downstairs is not enough.