Why Edge Cracking Is the Failure Point in Tempered Glass Screen Protectors A Manufacturer’s 10-Year Field Analysis A Brief Response One of the primary causes of tempered glass screen protectors failing under regular usage is edge cracking. In reality, a lot of fractures that develop later start out as microscopic flaws made during CNC cutting, polishing, chemical strengthening, thermal processing, or handling. These flaws could go undetected until they spread due to case pressure, temperature variations, pocket pressure, or a little impact. Glass that is thicker is not the answer. Long-term durability is more dependent on improved edge polishing, regulated [...]