8 things secretly making your allergies worse at home, according to immunologists – and what to do about each

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Pollen and pet dander can trigger allergies, but do you know about the lesser-known habits and household elements that could be making your allergies worse at home?

For instance, did you know that poorly fitted bedding can increase your exposure to pet dander and dust as you sleep? Or that a neglected humidifier can harbor mold?