He's lovely - I'm glad progress is going well and yes you do sound nice and caring with him. Our hamster is also very clean with his toilet habits and likes to put substrate on top of where he has wee'd (for his own benefit I think!). What sort of house is he in? Just wondering if a potty would fit in it! If not then I'm sure his current method won't be too difficult to spot clean if it starts to get whiffy
