yea i looked that up there and saw that, hopefully it's just him being smelly :P
i clean out his pee bits every 2 days (and fully cage clean every week)
i only got the hamster heaven a few weeks ago and hav smelt it more since then, maybe it's because he is in a cage where there is more ventilation and im not used as much to smelling it because he was in a rotastak cage (unfortunately) before this. if you know what i mean? like the smell gets out more? lol thanks