How often you set your particular cycles depends on your local humidity. No one can really predict what will work for your situation. Test your schedule by monitoring the cage humidity between fogging periods to see how much variation this schedule provides. That's the only real way to know. If the cage isn't drying out too much but isn't sitting saturated (very high constant humidity) it should be good, but testing will also tell you if you really need to spray/fog this often.