By spot - cleaning, you can go longer between bedding changes / cage cleaning before the cage starts smelling bad or looking dirty. (dwarfhamsterblog.com)
You might also place a mattress pad over the bottom sheet to soak up urine and prevent complete bed changes with accidents. (howtoadult.com)
The sleeping surface can be removed from the wood frame and extra surfaces may be purchased which makes for convenient bed changes in the middle of the night when accidents happen. (mommyscene.com)