Reasons for carpet beetles infestation
As with any potential insect infestation, the best way to deal with it is to prevent it, and it is for this reason that regular housekeeping is important. Eliminate breeding places by thoroughly removing lint on a regular basis. Be especially thorough when cleaning your rugs, carpets, closets, shelves, and radiators, as well as ducts, mouldings, corners, and floor cracks.
Periodically check that your windows and air ducts are properly screened and ensure that no bird nests are near these points of ingress.
When storing articles of clothing, be sure to launder or dry clean them first to present a less-tempting target. Items should be stored in tightly-sealed boxes or chests, avoiding plastic bags, which may result in damage to clothing during long-term storage.