These small insects can move through wall voids between apartments. Caulking crevices around sink pipes which connect kitchens may help. If many residents are having problems it may be necessary to attack the problem as a group with thorough clean-up and apartment wide treatment by a pest control operator. Remove all dishes and foods before cleaning and treating storage area for insect control. Remove paper or oilcloth shelf covering before clean-up.
Insects readily hide under such coverings.
Use a vacuum cleaner to clean debris from cracks and corners of storage. Also clean all nearby area, especially spills and crumbs behind and alongside stoves and refrigerators. Check the dishwasher area and toaster for crumbs. Scrub food storage space and vicinity with very hot water and a strong detergent solution. Allow to dry thoroughly.