Shampoo, lather, rinse, and repeat!
Make sure you do it twice!
Always remember the repeat. The first shampoo and rinse doesn’t rid the hair of all of the dirt and oils that you’d like to wash off. It breaks it up somewhat, but the second lather and rinse is what cleanses the hair, as I learned in cosmetology school back in the day.
Also, see what type of conditioner you’re using. Too much drying may make your scalp produce more oils to compensate. Too much oils in the conditioner will make your head fitting for Channukah.
My hair is straight and thin, and only takes a day or less to reach latke levels – so yea, all is good 🙂