12 watches died at work, why?

@isakrittl - I think you hit it! I had forgotten about this question.

Right. But the "fumes" would have to be a continue cloud to do the damage they are doing in such a short time. I'm talking about devices dying out in a matter of hours, sometimes it takes a day or two of exposure. But with that kind of damage to the phone, we should me all dead by now ourselves. We use lead free solder, we have several PHD's in the building, I'm sure if we were causing that many fumes they would have made a stink about it by now. Pun intended. ;)

I guess my answer will never come, because this seems to be going way left field here. This isn't a noxious environment, we aren't burning solder by the kilo and the "vapors" are nowhere near the devices let alone concentrated or exposed enough to eat away at components. Remember, there are other sensitive electronic devices that we produce and use on a daily basis here and none of that is eaten away or malfunctioning. It's APPLE products only. So unless they made them inadvertently hyper sensetive to miniscule amounts of solder (I've seen hobby shops produce more solder/flux vapors than our department) I don't see how any of what you guys were talking about really rings in here. Try to read my entire post front to back again, please.

EMP: Again, we use various electronic devices in here. PC's, Multimeters, Calibrated Current sources pushing 10 microamps of current, we measure sensors that are calibrated down to .02 Kevlin. So if we aren't messing these devices up, tell me why is it only Apple phones/Watches/Pencils are failing. I've had an Android phone and watch for over a year back here and never a hiccup. We have several people who use Bluetooth Headsets, not one issue or decrease on range. But you bring an Apple device back here and it's a roll of the dice if it lasts a day or hours in some areas.

Clearly this is beyond what we can offer here, and besides we are not the ones that could do anything about it. It still comes back to what is happening in your site. You'll need to identify the source.

I've been servicing Mac & iPad systems for years and I've serviced large installations of both. I have not seen a rash of failures like what you are describing here. Frankly, I rarely see any Bluetooth failures and they are always after the system was dropped.

I think you need to talk directly with Apple to get an engineer to visit your site to see what they can discover. And, no Apple products are no more sensitive to what ever emissive source you have in your environment than another device. I just think your collectively using more of them than others.