Broken Kettlebell

I have a very funny friend named Dave. He comes over my house and makes fun of my Kettlebells. Well he is always threatening to start exercising to get in shape... This has gone on for years. I am not one of those guys that tries to get everyone involved in what I'm doing. So, out of the blue my pal Dave tells me he wants to take a crack at kettlebell training... I say great, come on over. We go over over the basics... Grip, swing, clean, press.. You get the Idea.. I explain how to train, and I give him a 12kg bell to get going... After like 3 months, he calls me and informs Me that the kettlebell isn't working... Apparently it just sits there...