I'm really trying to get second day hair. Actually, I wish I could get nice 1st day hair, but I'm trying to be patient.

I use either Deva Care no poo or As I am Co-wash to cleanse my hair. I have been told that I don't need to wash daily, and that I could probably go 5 days without washing it. How is this possible? I have knots and tangles after the first day.

Am I not supposed to wash it when I'm in the shower on days 2-5? It seems strange to get in the shower and not wash my hair. Should I be wearing a shower cap? Or do I just wet it and use a rinse out conditioner and then follow up like I would with my styling products?
2 b/c at the moment, 3a when not relaxed
Medium Texture
Normal Porosity