I actually started the night before, showering without shampoo. I did wet my hair, and it was already sticky and hard to slide my fingers through them.
The morning of Day 1 my hair was still sticky, but not that noticable. Through the day I didn't sweat a lot on my head, and I didn't feel any itches on my scalp as I usually do. I showered again at around 7 PM and my hair was STILL sticky. No itches, and not many flakes.