Most cheapest and effective way??

Lemon

Exfoliate your underarm regularly. Switch to waxing the area instead of shaving and use cocoa butter on the area. Hope that helps.

Hi punkchic.. how do I exfoliate my armpit?:confused:

You use a body scrub on the area. Apply it and rub it in circular motions gently. Then rinse off.

What kind of body scrub?

Any will do. They can be purchased from any beauty shop. There is a wide variety to choose from.