I need some help to solve a mystery in my house:
You probably know the smoke detectors that start making a beep when they are getting too old.
I have that kind of beep in my house, but it is not coming from my smoke detector, which I have recently replaced.
It beeps just once but several times a day. It’s been beeping for a few years now. It’s coming from the kitchen, but I don’t have a smoke detector in the kitchen. I can’t figure out what is making the noise. I used to think it came from the only smoke detector I have which is in the hallway, but since I replaced that, I do not have any explanation. The only thing I have in the kitchen is two special safety outlets that have a green light and two buttons that turn them on and off.
Anybody who can solve the mystery?