Lighter issues

[T.G]

Have you tried filling from a different can of butane?

I've had nozzles on the cans get damaged and as a result they either won't seal well enough to the fill valve on the lighter to force the butane in or fit well enough to depress the fill valve on the lighter to allow butane in. Depending on how badly the nozzle on the can is expanded, fill adapters sometimes won't even help.