[Trevor]

"William Sommerwerck" wrote in message
...
I've got a better suggestion. I'd contact Caig and "urge" them to replace
the cans.

Good luck.

There's no reason the cans should lose their pressure.

Of course there is, the valves leak.

I have a can of
Prestone "Tuff Stuff" cleaner that's almost 40 years old and it still
works.

I've got 30 YO pressure cans that still work too, but have thrown FAR more
out that don't.

Trevor.