If you find yourself in a routine where you are shampooing your hair more than 3 times a week, then you need to stop. You could be stripping your hair of its natural oils that it needs to retain moisture, which could also be contributing to problems with greasy hair. If you feel like your hair looks greasy a couple of days after shampooing it, then there are a couple of tricks that you can do to avoid this from happening again. 

Dry shampoo is really your best friend in this situation. You should be applying the product to your roots in layers and then gently massaging it in with an old cotton t shirt to avoid frizz – avoid using your hands as they hold natural oils you can pass onto your hair. You could even use the natural oils to your advantage and style your hair into a ponytail, a bun or plaits, as the oils in your hair will help hold the style much better than freshly washed hair.