2 month Rain X Anti Fog test on my living room windows. Left treated/right untreated. It helps but doesn't prevent buildup entirely. : r/electronic_cigarette
Rain-X® Anti Fog - Rain-X
Amazon.com: Rain-X Anti Fog, 3.5 Ounces, Clear : Everything Else
Rain-X Anti-Fog + Rain Repellent Window Mirror Glass Treatment Car Com – Thinkprice Online Store