Periodically check you receptacles and switches for any discoloration. If you are seeing any indications of burning or heat it is time to change that device. Off coloration is a warning sign that the device has arcing on the inside and it is on the verge of failing or starting a fire.
![Tip for the Day: Prevent A Fire](http://pdqelectricnv.com/cdn/shop/articles/socket-showing-discoloration.jpg?v=1663653470&width=1100)