how to do a waxing and waning

Press the thread against the wax to the extent that it stands up when you hold the end of the thread and pull repeatedly.

Pull the thread in different directions so that the thread is covered with wax.
The purpose of wax pulling is to prevent fluffing of hemp thread, to reduce thread breakage and friction during sewing, and to prevent loose stitches.
It is better to heat the thread with a hair dryer or iron so that the wax can soak into the thread.