Bacteria and fungus thrive in dark, moist and warm places, and overnight treatments could add up to the perfect storm, so to speak ... so that you may have a mild infections that doesn't make itself obvious until you do treatments.
Originally Posted by Korkscrew
Very well written.
2a-2c, medium texture, porous/ colour treated. Three years CG. Past bra strap length heading for waist.

CO-wash: Inecto coconut/ Elvive Volume Collagen
Treatments: Komaza Care Matani, coconut/ sweet almond oils, Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss Ultimate Volume, various Elvive
Styler: Umberto Giannini jelly, Boots Essentials gel
Flour sack towel, pixie diffuse or air dry.
Experimenting with: benign neglect