Generally skin become very oily during the summer. Most people think splashing their faces with cold water is the best solution to beat the oiliness and the heat. But this is not advisable as cold water traps all the oils and dirt on the surface of the skin. This leads to black heads and acne. Instead wash face using luke- warm water and mild face wash.
Washing your skin so frequently will actually irritate your skin and increase oil production! Washing too frequently will strip the natural oils from your skin, causing your skin to overcompensate and produce even more oil.