I bought a MSR 22 oz fuel bottle and tried my stove. How do you depressurize the bottle after use? I flip it over to OFF and burn the remaining fuel in the fuel line as indicated in the directions. But after I do this, there's still pressure in the bottle...

If anyone owns (or has expreience) with the Primus Multifuel stove I would love to receive some pointers/tips.

Thanks.