[freyashamsters]

If it is soiled then I wouldn't change it every day but maybe every few days

I know a lot of people on here have the Rodipet labyrinth houses. They are a great size for Syrians and the different compartments encourage them to use each on for different things eg. hoarding, nesting, toileting etc...

You can also put a cardboard insert in the house that may encourage her to pee in the other side but these work best with wooden ones like the Ferplast Sin Guinea pig & rabbit houses - the hamster one is too small

I agree with Cypher, definitely get a litter tray - this can be as simple as filling up a small bowl with some chinchilla sand (not dust, this is too fine and gets into their respiratory systems) and she may take to peeing in that instead