Although the instructions on the box suggest using facial serum after washing your face, honestly, it’s entirely up to you 😊
Everyone has different needs based on their skin type, the climate where they live, the other skin care products they use, and any medications they might be taking. Some people like to use facial serum alone, others like to use it as a base before applying a moisturizing lotion. Some people like to use facial serum both at in morning and at night, others prefer one or the other.
I personally have very easily congested skin, so I prefer to use it as my only moisturizing product; however, the medication I take makes my naturally oily skin very, very dry. In the winter I find I need to use facial serum as a moisturizer in the morning and at night, whereas in the summer I only use it after washing my face at night, and only in the areas that feel tight or dry after washing. From time to time -- depending on how humid it is, I use facial serum as a base before applying makeup in the morning.
Given all the possibilities, I recommend that each person try what feels instinctual to them, and adjust based on how their skin feels. Only you will know if a particular product, combination of products, and/or product routine is right for you and your personal circumstances.
I hope this is helpful information!
All best, Milena