Worth noting that while side and back windows are tempered, windshields are typically laminated. The difference is in how they break. Laminated glass will gen

Worth noting that while side and back windows are tempered, windshields are typically laminated. The difference is in how they break. Laminated glass will generally crack, but otherwise stick together, while tempered glass will shatter, but into less-sharp pieces (to minimize the hazard of broken glass). I don't know how much of this matters, but it stands to reason that what works on a side window might not be the same as what works on a windshield.