Thanks all for the advice. I'll try a corner toilet, definitely sounds like a great idea.
I was under the impression when I first got him a few months back that he'd always use the same spot and I'd be able to spot clean.
Btw Ria, when I say pet litter, I don't mean cat stuff, I was talking about specific hamster stuff
When you say substrate, just the same stuff you fill the bottom of the cage with? Or do you have a more natural base?
I guess this leads onto "What to put in the bottom of a cage?". I notice some people use bark chips, but I'm worried that stuff is treated and I know certain woods aren't brilliant to use.