One way to tell if small pieces of wood like that are still drying is to weigh them on something like a small electronic scale similar to what reloaders use or drug dealers if you know any. Small, waxed pieces will still dry somewhat even with wax on them, just not as fast as without. I weigh rough turned wood of my wood turnings with a electronic kitchen scale to track their drying progress, but that is not accurate enough for small pieces.
Just to more clarify, for small pieces such as this, you would need a scale that reads in grains. If you have had your small pieces, such as pen blanks in size, and they have been heavily waxed, they can still hold some moisture after a couple years. Not much though and should dry quickly after wax is removed. If you are in a hurry, you could put them in a microwave for a short series of cycles, or I guess in a oven for a short bit. Weigh them before and after