Why is the sugar on my cotton candy going onto the sides?

When we use our cotton candy machine the sugar goes onto the sides. We have tried different ways to hold the stick and it still collects half of the sugar we put in. We put the amount it tells you to. One full scoop with the stick. Do you guys know how to stop this? It would help a lot. Thanks for reading! :] The machine that I had to put is not the right one I use. I just put a random one because I had to select something. Bye