Very tiny flakes in hair, dry scalp no dandruff, what can I do?

Been doing nopoo for a few days now, my hair isn’t overly greasy and I got so much volume, more than in years (last time its been like this with 16).

I only rinse with warm water when I shower, so everyday. Is my approach wrong?

The flakes are very, very tiny but still visible sometimes.

Started this out of pure coincidence, thought on the day I started „I don’t want to wash with shampoo today and see what happens“.

Hot water not good? anything natural that helps with my dry scalp problem? I don’t wanna look unclean, I shower everyday but hair „care“ products just make my hair so thin and without volume.