One of the first few PSKs I made had PA in a glass vial in it. Over a period of a year, I noticed some problems with corrosion on the wire saw, probably due to iodine fumes from the PA.
The PA was replaced with puritabs and everthing seemed fine.

I was just inspecting the kit again, when I decided to test the sparklite. Puff! A cloud of smoke emerged when I spun the striker and realised it was the flint in the sparklite that disintegrated. Just what a PSK needs - a dead sparklite. This is what mr murphy does to screw you even when you ARE carrying a PSK.

Lessons learnt:
Inspect and TEST everthing in your kit. Yes, even the lighters, matches and sparklight, compass and whistle. Also pens for those who include SAK pens or fisher space pens.

Has this happened to anyone else besides me ?

Yes a Bic lighter and the same problem with the Iodine check your PSK’s And FAK’s regularly! Most likely moisture trapped in tin when you sealed it up corroded it...
I keep a Ferro Rod that has been sealed with clear Nail polish {you can use varnish or polyurethane} just as long as it is transparent so you can see any change’s to the Rod