The answer to 'why is my stink bug nests' is that stink bugs are looking for a place to overwinter and may be building nests or aggregations in your home. Stink bugs are attracted to warm, sheltered areas like attics, walls, and cracks and crevices. They release a foul-smelling odor as a defense mechanism when disturbed, which can be unpleasant for homeowners.
To get rid of stink bug nests, you'll need to seal up any entry points around your home and remove any existing nests or aggregations. This may require a combination of DIY pest control methods and professional extermination, depending on the severity of the infestation.