I would strongly recommend that you use a moisturizer before applying this powder. Try a pretty fluidy moisturizer than contain Hyrolaunic acid to lock in the moisture on your skin. Be generous to apply the moisturise around (but not on!) your mouth area as that tends to move and dry very quickly. Allow your moisturise to dry fully before applying this powder. Also, using a stippling brush to apply the powder will help you appear less dry and cakey.
Hope this helps :)