I wash bed sheets weekly. Once the weather warms up, we switched to our Summer sheets, most of which are vintage, 100% cotton that I treasure. New issue lately: both teen sons sheets (top sheet and pillow case) are yellowing, a greasy yellow stain towards the top of the top sheet, and on the pillow case. Brings to mind the Tide detergent "body soil" commercials of a few years back.
I wash in warm water (have for years) if they are white (most of these vintage cotton ones are), use bleach, and line dry in the bright sun. Recently have been using Tide aka "the good stuff" vs whatever I get on sale, which is usually Purex, although when the Tide ran out yesterday, I grabbed Wisk out of the cabinet.
This is simply gross! Thoughts? I turn down their bedspreads, and although they each have lighter blankets, usually they aren't using those either, as it's been hot. Clearly they are sweating at night-a good soak in some detergent? washing soda? Oxi powder?