GT85 killed my kryptonite, although it had water in it, was old and well used. I use green lube after wilko home brand WD40 on my Onguard but again well used and caught in the occasional shower, from new however it never crossed my mind to silicone spray before use. The onguard has out lived by a number of year an Oxford and the aforementioned kryptonite. I would buy Onguard again, the one you purchased looks like mine but newer & yes the lock can jam mine has twice.silicone lubricant
Wasn't it for spare keys only, I think mine came with 3 +1 main if you get extended warranty then maybe. Prob just a quick online form.worth registering