If your garage door won’t open, one of the first things you should check are the sensors. These laser sensors can be found on the base of the garage door opening. The sensors should be pointing directly at each other and there should be no blockages.
Sometimes, these sensors need to be wiped clean and realigned if the garage isn’t opening. When cleaning these sensors, it’s important not to use any harsh chemicals or paper towels. The lens on these sensors is delicate and can easily be scratched. If the lens becomes scratched, then you’ll need to replace the entire sensor.
In most cases, a soft microfiber cloth, like the one used to clean glasses or television screens, can be used without any cleaning liquid. If the lens is still dirty, then you can lightly moisten the cloth with water.