Satin pillow cases, silk scarves, satin bonnets.. none of them work for me, so I feel your pain.
Recently I've just been 1. tipping my head upside down and fluffing, 2. spraying *a little* water in my hands and glide it over the limp curls, 3. putting a frizz free serum or a bit more leave in over my curls and scrunching. Works like a charm on most days, and my hair doesn't get all that wet. I used to saturate it everyday, but no more in the colder weather!
2c-3a - med width- low porosity - high density - growing out to donate
POOS: Sevi Seabuckthorn, Neutrogena Anti-Residue
RO/LI: Suave Coconut / KCKT
PT: CNPF, gelatine mix
COLOR: henna, amla & indigo
= humectants in low dews