Just curious, but I've used Salicylic Acid before while on Retin-A and am not sure if I should continue because I heard that Salicylic Acid breaks down Retin-A so it won't have the same effect, or is that BP? Also, if Salicylic Acid doesn't break down Retin-A then is it okay to use a wash containing Salicylic acid before I apply the Retin-A or is that too harsh? Thank you!