Got six Hikvision DS-2CD2087G2-L Cameras and two of them developed a crack. Lucky for me it happened under warranty so they were replaced (Thank you Hikvision). Wondering if anyone else has had this problem? One thing that may have caused this is the way I clean the cameras, which is spray some aerosol glass cleaner on the face then wiping it off, which I no longer do. Now I spray onto paper towel first. I'm thinking the temperature change is what caused the glass to crack.