Do you put wax directly on the coil?

Yes, but make sure to apply the wax concentrates gently onto the coil and be extra careful not to knock the coils out of place with your loading tool. When using more viscous and gooey wax concentrates, the material can be stubborn and won’t easily come off the loading tool. If this is the case, you can gently twist the loading tool while hovering it above the coil. Nevertheless, make sure not to touch the coils as it can damage the atomizer. If your wax concentrates are highly viscous and can be tough to deal with, you can cut them or break them into smaller pieces to make loading the wax pen easier.

A wax pen that has a shallower and smaller atomizer will offer easier and more convenient loading as you can easily see and access the actual coils and atomizers with deeper and narrower atomizers can be tricky to load wax concentrates into.