Can we fix it?
Fixatives - plant, animal, & synthetic - have been used for thousands of years in perfumery, from Styrax to Ambrox, Ambergris to Iso E Super. They help your fragrance to last longer, buy they can have other superpowers too.

What are they for? How do you treat them? What do you need to change your fragrances' behaviour.

This is in answer to a request, but there is no magical instant fix to make all perfumes smell the way you want and last all day. Sometimes it happens when you use a new combination of materials. Sometimes it doesn't. But there are some useful ways.