Hi to all you makeup experts out there.. Can anyone comment on the use of astringent? good for you or just a waste of money?? if good, what is the best out there now ? I just started to use one by clinique again.. (off and on again!) and I heard from one colleague that is was just a way to make money, not really necessary for us in terms of helping out our complexion .. what do all you gals /guys think !!