Q1. Is there a right way to shampoo?

A. Shower to warm up your hair and scalp thoroughly before applying shampoo.
Shampoo lathers up better on wet hair.

Wash twice, if possible.
First: to remove dirt and sebum on the surface quickly
Second: to clarify scalp

Rinse thoroughly to finish up.

Q2. Does over-washing harm my hair?

A. Scrubbing is a no-no as it damages your scalp.
It is important to wash thoroughly to remove buildup in pores.

Behind your ears are where often missed while shampooing.
Remaining sebum will be oxidized to be a cause of smell…
Make sure the whole scalp is washed.