I want to know a good shampooing method for the scalp.

There are so many types of good shampoos and treatments pouring out, but

It seems like they don't actually know how to shampoo properly.

How can I shampoo while keeping my scalp and hair healthy?

Is it good to wash my hair every day?

I actually feel like my hair gets drier if I wash it every day.

They told me not to dry my hair with a towel after washing it.

The hair salon told me to wring out my hair thoroughly with a towel after washing it, but I'm curious if shaking it is really bad for my hair.

I am also curious about the difference between rinse and treatment and how to use them.

I use a treatment so I don't use a separate rinse, but I think I saw somewhere that I should use both.

I would like to know accurate information.