I also use my first bottom module. Got my FP2 in week one 2016.
You should try playing the lottery 
By the way: I can not recommend using any kind of contact spray or alcohol based cleaner on the inside of the Fairphone!
The reason is simple: the small gold spring contacts are very sensitive. I use some kind of these contacts in the company I work for. You can clean them with A LITTLE pure alcohol dispensed on a cloth and wipe them.
If you flood them with a liquid, I made my experiences with contact problems. So it could come to malfunctions which are very hard to find.