"well the reason this has not been answered is that there is technically no such thing as a reverse microwave, so if you find an answer sell it to some company like GE and make millions"
That's not quite true. Yes it is true that there is not a reverse microwave as far as process goes. There is a device which is being worked on currently that uses magnetic fields to put molecules from a chaotic movement (heat) into a more ordered movement (cold). This link has a lot of information about magnetic refrigeration.
microwave innit
No, a microwave will not work as a Faraday cage.
I had to buy a new microwave because my old one didn't work.
They work relatively well although it is easier to use just a microwave or just an oven.
No.
Nothing because the microwave does not work when thy door is open.
No, a microwave oven would not work in space because microwaves rely on the presence of air molecules to transmit heat to the food. In the vacuum of space, there are no air molecules to heat up the food, so the microwave would not function properly.
Any microwave cleaner will work well, or you can just use water and a damp rag,
Any kind of nook will work as long it has a stud or surface that will support the weight of the microwave.
Jobs related to microwaves include microwave engineer, microwave technician, and microwave product development engineer. These professionals work on designing, testing, and troubleshooting microwave devices and systems such as microwave ovens, radar systems, and satellite communication systems.
Transmission problems.
The same as it does for visible light.