[Winterjay]

I agree that you should probably get a refund.

But you can try adding some hamster safe oil like olive oil,sunflower oil, coconut oil, or even bag balm(stuff they use on cow udders and as a hand cream) to the spoke and see if that helps. If your hamster is not a licker you can use vasoline (which I find has worked the best) but I wouldn't recommend it because its a petroleum product.

As a person who rarely gets to the pet store this has helped me, the only bad thing is that you need to re-oil once in a while.