And secondly, If my hair is in need of a wash, my face becomes very oily. Once I wash my hair, the oilyness goes away (I've noticed this in other people too).
If skin cleansers are used to strip the grease and oils from our skin, does that leave the pores wide open, so that dirt (or other face creams) can get in and block them?
I have also read (on here) that our natural skin oils slows bacterial growth, so cleaning would let the bacteria breed more readily?