PHILADELPHIA -- Philadelphia police are investigating the death of a woman found inside a Staples store bathroom with nearly a dozen empty cans of an aerosol keyboard cleaner.Workers found a 36-year-old woman inside the store on the 7700 block of Germantown Avenue in Chestnut Hill.Police said managers used a crowbar to get into the bathroom after an employee realized that the woman had been locked in there since about 9:40 p.m. Friday.Medics performed CPR, but she could not be saved.Police said investigators found 10 empty cans of the keyboard cleaner in the trash and two more cans in the woman's handbag.Officials said the product, which had been stolen off the shelf, has a warning label saying "inhaling contents can be fatal."Investigators are now awaiting the results of an autopsy to help determine how she died.There was no word on the woman's identity or if she was an employee of the business._____