The reasons they have returned is not fully understood, but is believed to be partially due to an increase in travel among people, which includes easy movement of luggage or other items that may have become infested. Due to changes in regulations, pesticides that previously were used to control these offending insects are no longer being used, which may also be a contributing factor to their resurgence. They can be very difficult to get rid of, especially if there is a severe infestation. Usually when this is the case, it is more cost- and time-efficient to hire a professional bug exterminator to eliminate the infestation and help prevent a re-infestation.
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