ISSA and the Cleaning Industry Research Institute (CIRI) revealed improvements to the ISSA Standard for Measuring the Effectiveness of Cleaning in K-12 Schools (Clean Standard) that enhance its use in evaluating cleaning processes at school facilities.    The Clean Standard provides K-12 schools with a tool that helps them evaluate and monitor the effectiveness of their cleaning processes using both a quantitative measure (i.e., ATP meters) and traditional inspection methods. The ability to obje...