Doctors generally advise avoiding prolonged exposure to a direct stream of cool air, particularly if it causes discomfort. The bigger concern during the monsoon is humidity, ventilation and cooler hygiene. A poorly maintained cooler can circulate dust, odours and other contaminants, while stagnant water inside the unit can become a breeding ground for mosquitoes. The cooler's water tank deserves special attention during the rainy season. Most importantly, clean the water tank and cooling pads regularly, remove stagnant water and maintain the appliance properly.