Waking up to a bird-nest? It is usually just friction from your pillowcase...

https://www.primary-bookmarks.win/ever-wake-up-with-a-bird-s-nest-after-nine-years-in-salons-i-know-your-pillow

Waking up to a bird-nest? It is usually just friction from your pillowcase causing unnecessary frizz and tangles. A silk pillowcase or soft hair-wrap is a total game-changer