I've recently ordered products from the ordinary as everyone is raving about them and there's so much to choose from ( which is the confusing bit) and half the price of normal skin creams etc. My question is has anyone ever used the The Ordinary Moisturizing Factors + HA with the lactic acid 10% ? I know the lactic acid has to be used at night but can you use both together at night ? Also what are you supposed to wash your face with before hand so a reaction doesn't occur xx