Retailers are being urged to learn from the summer sales season as shoplifting reports have surged to a 22-year high in Chicago. A notable trend contributing to this increase is 'wardrobing,' a type of retail fraud that peaks during the summer. 'Wardrobing' involves customers purchasing expensive items, wearing them with tags still attached, and then returning them for a refund. This practice has been identified as a significant factor in the rise of retail fraud during this period.