I took my 2 fig trees out of dormancy early this past winter, attempting to air layer the branches.
I cut a 1" wide band of bark from the branch, and then scratched off the thin layer of membrane, below the bark, with the knife.
I applied raw honey to the section and then enclosed the area in a small ball of damp and sterile potting soil. I then wrapped each in plastic wrap, and then aluminium foil.
It worked, each one took.