To completely eradicate a carpet beetle infestation, you'll need to remove adult beetles, larvae, and eggs. This can be done through a variety of DIY methods.
I started in the pest control business doing a walking route in Brooklyn before I had my driver's license. Even back then, I remember my father saying to me, when the forsythia bloom, the termites swarm on Long Island. Ever since then when driving on the Northern or Southern State Parkways, and seeing the green forsythia turn yellow, I think of my Dad and termite swarms.
When I first started in the business, | remember using chlordane; that was the go to product for controlling termites. We dug trenches around homes against the wall and then filled it with large amounts of chlordane. If there was concrete, we drilled holes about 16 inches apart and filled those with chlordane.
The experts say there are more rats and mice in Manhattan than people. I remember, not too long ago, standing in the lobby of a 235-unit coop apartment building that we service on 145th street, talking to the doorman, and a rat ran from the sidewalk right into the building. So much for professional courtesy! I asked the doorman how often that happens. His response surprised me. Every time they do construction on the water mains or the sewers, the rodents seem to run wild.