TM M9 mag problem

[Brakoo]

Hi people,

I need the help of some of you guys for this mag problem I just got. I just got home from a game last night where we got soaked by rain. I noticed that the mag tha was in my GBB had a rattling noise to it.

I tried shooting the remaining BBs and things went fine. I proceeded to remove what was left of gas in the mag and I still had that same noise. After dropping silicone oil into the mag and refilling it with propane I still had the same noise only thing now is that the mag won't fire at all. I tried my GBB with my 2 other mags and they shoot fine.

Anyone would have any clue what might be the problem here ?

Thanks in advance for your help.