I read an artical about a topical recipe for Fina. It suggest using 1 bottle of Androsol and 1 bottle of Nandrsol each having 1 box of Fina per bottle. Then you use the Nandrsol in the morning with 75 sprays and the Andrsol in the evening with 75 sprays. My question is, is it neccesary to use both Andrsol and Nandrsol or can you use just one or the other?