I just started using a retinol treatment on my skin ("help me" by philosophy). So far seems to be doing one job -- dried up three huge zits on my jawline practically overnight. I just wanted to know what people think of this stuff, what I should expect, if you credit retinol with clearing up your pores, etc. The "help me" is a sample, so if anyone here uses that product, do you reccomend it? And should I be exfoliating also?