To clean fogger nozzles, soak them in vinegar overnight. Consider buying a higher pressure booster pump. A 200 psi booster pump will put out more water and a finer mist than a 100 psi pump. Protect fan and fogger thermostats from moisture put out by the fogging nozzles. If they get wet, they will shut off prematurely and your birds will suffer.
Water is critical during hot weather.
Inspect the watering system frequently to insure water flow is constant and unrestricted. Remove built up and caked litter from the house.