Cleaning a Kidde Photoelectric Smoke Alarm (The Right Way) 

Has your Kidde Photoelectric Smoke Alarm started to trigger randomly? Have you tried to clean it as instructed using a vacuum cleaner or compressed air and STILL the alarm continues to trigger? This guide is for you! Learn how to disassemble a Kidde Photoelectric Smoke Alarm (model P12040) and clean it properly (these instructions may apply to other photoelectric smoke alarms as well). Save your money: no need to replace the unit you already have when you can just spend a few minutes to clean it the right way.