A Shave it all off. Do a Demi Moore in G.I. Jane because clearly you're a zero-maintenance girl who doesn't like to wash her hair. That's rather slack and unhygienic in our humid weather.

The glands in our skin produce sebum, an oily substance that conditions our scalp and hair naturally. It becomes problematic when there is an overproduction of sebum - because of hormonal or nutritional imbalances or overactive glands - causing an oily scalp and turning hair greasy.

This can become a breeding ground for bacteria and increase the chances of scalp problems like dandruff and the itchies, and worse, premature hair loss.

If you don't use the right shampoo, it can make matters worse. Some shampoos have lots of surfactants (the agent that makes lather) which can dry out scalps, causing them to produce even more sebum.

The solution: Use an oil-control shampoo, one that's free of harsh chemicals and still respects the skin's pH levels, so you don't cause more upswings in sebum production.

Phyto's Phytocedrat Sebum-Regulating Shampoo,$28

I swear by Phyto's Phytocedrat Sebum-Regulating Shampoo (right, $28, from Robinsons The Centrepoint and Raffles City). Now with even less preservative, it is milder on scalps and gets rid of the slick without leaving your hair dry or flat. It also cuts down the need for frequent shampooing, so eventually you can just shampoo every other day.