I have been using Retin A .1% cream every night for four months. I tolerated all the peeling and redness and no long experience any of that. I just love my skin now--I will continue to use it nightly for about another 2 months but I think I am ready to go on a "maintenance dose"---what is that exactly? Should I reduce to EVERY OTHER night or about TWICE a week? I am concerned that my face will go back to the way it was? What do you mean when you say the results of Retin A are "CUMULATIVE" Thanks.