First, stop washing your hair every day and gradually add days between washes. If you need to rinse your hair daily, use cool water to preserve oils. At some point, your scalp will get used to this routine and you will achieve less greasy hair. Then, scrub well with warm water every 7-10 days.
Water won't really do anything on its own to remove natural oils from your hair, and yes it will be drying if you don't follow up with a bit of leave-in conditioner, dry-oil or something like that. :)
Washing your hair with just water will not be enough to dissolve and clean away the natural oils that you hair and scalp produce, so you still need to cleanse your hair with shampoo that has cleansing surfactants that can help wash away and dissolve the oils, dirt and dust.
Here are the 3 best ways to get rid of your greasy hair. firstly, use a dry shampoo. to absorb the grease without having a full on shower. Secondly, use a scalp exfoliator. to remove build up on the scalp. that's causing your hair to get greasy a lot quicker. And 3rd is to stop wearing hats.
Technique: Wet hair, then use fingerpads (not nails) to gently scritch the scalp in relatively quick motions (just like scritching before). Focus the water stream directly on the area being scrubbed so it can wash away dirt and oils while scritching.
Which Hair Types Benefit From Washing With Just Water? Water-only washing works best with curly, coily, thick, and coarse textures that are prone to dryness. Chambers-Harris recommends following up with a deep conditioning mask or conditioner to seal in moisture after washing the hair with water.
How to make your hair not look greasy in 5 minutes? To quickly refresh greasy hair, apply dry shampoo to your roots, let it sit for a minute, then brush through to absorb excess oil.
Rinsing with cold water will give you smoother, shinier, more moisturized hair. However, doing the entire wash with cold water isn't necessary–it won't clean your hair as well as warm water will, and your hair could look greasy and flat at the end.
Luckily, there are some quick fixes to help freshen up greasy hair without washing it. If your roots are looking greasy, use dry shampoo or blotting paper to absorb excess oil. Apply the dry shampoo lightly, focusing on the roots, and let it sit for a minute before brushing it through.
Yes, there is no harm in washing hair daily with plain treated water but prefer cold water.
“When you wash your hair upside down, you're giving the root a little lift and allowing the product to spread much easier, resulting in a better cleanse.” If you use leave-in treatments or styling products, don't underestimate this value.
If you stick with water-only washing long enough, it's speculated that the natural oils from your scalp will eventually travel all the way down your hair shaft to restore moisture and softness to your strands and even help reduce frizz.
Use an Exfoliating Scalp and Hair Scrub
To gently exfoliate daily buildup, use a delicately exfoliating scalp and hair scrub as part of your hair care regimen once a week. An exfoliating scalp scrub can be used as a precursor to shampoo or as a shampoo itself and works wonderfully for a deeper cleanse.
Washing your hair every day contributes to an oily buildup. The more you clean your hair, the more oil your scalp produces to compensate. If you normally wash everyday, it'll take time to get used to washing it less. So start by going an extra day or two in between your normal washes.
If yours is short to medium length, use one teaspoon of baking soda and vinegar in one cup of water. If your hair doesn't seem clean enough once it's dried, use more soda next time. You can also use white vinegar; its smell dissipates quicker than ACV, but neither lingers after rinsing and drying.
Oily hair isn't healthy or unhealthy by default. People with an oily scalp can have healthy hair or dry, brittle hair. Your hair needs oil to be healthy, but too much oil can lead to buildup on the hair and scalp. Oily skin may also contribute to a condition called seborrheic dermatitis.
“In some people, [hair training] can take a few weeks, and in others, it can take months.”