Gas charger leaking

[l96Freeman]

I got a gas charger a while ago to refill my pistol mag, and it always seemed to leak slightly. I just forgot about it but found it earlier and im wondering if there is anything I can do to fix it. Any help greatly appreciated.

http://www.actionhobbies.co.uk/VFC-Multi-P...rger_ARUPB.aspx

Basically a gas container disguised as a grenade

 

[Saltyyy]

Maybe the seals are dry? Put them in a bit of silicone oil