[header] How to clean a rat's cage [title] Wash your rat's cage on a regular basis. [step] Spot clean soiled areas daily and clean the entire cage at least once a week. If you start to notice an ammonia smell, you've likely waited too long. 
Set up a cleaning schedule so that ammonia never injures your rat. [substeps] Natural rat litters made from materials like hay/straw and aspen wood shavings will need changing more often.