Fragrance Formulation Development

Ask, I have tried น้ำหอม Embroidered diffuser in the ratio Reed Diffuser Base Type 1 70% mixed with หัวน้ำหอม 30% The smell is very good, but after 1 week notice the stem. It formed a white crystal. don't know what it is Is it dangerous? What is the solution? or is it normal

Hello 1. Do you keep it in a cool place? 2. น้ำหอม used as น้ำหอม from where?