I never kill them intentionally,
...but these are some of the ways .....
> I leave them in my pockets when I put my jeans in the wash
> I put them in the oven to defrost overnight and then forget about them until I next turn it on to preheat....
> They fall into the recycling bin when I rearrange my desk
> They fall in the toilet when I lean over to flush
> I put them on the roof of the car while i unlock it and then forget about them
> I plug them into the circit that already has the microwave, kettle and festive lights on it
> I take them where there is no signal and forget to put them in hibernate mode
> I put them too close to magnets
> I don't screw their caps on tight enough and they go flat