During the summer months, I find myself spending long hours indoors under the comfort of air conditioning – and I am not alone. Whether at home or in the office, air-conditioned environments have become essential for staying cool. But like many, I began to notice a persistent sore throat and occasional cough after several days indoors. At first, I blamed the weather. Later, I realized the real culprit: poor indoor air quality caused by neglected air conditioner filters.
