Reg gauge Creep

[chargdup]

Hey, Me and some mates recently bought sonic cyborgs. My mates reg pressure gauge creeps wen gased up and goes back to set pressure once fired. Then creeps up again. Anyway yesterday we were firing it then we looked at the gauge and it looks as if the gauge is all twisted like it crept so much that it went right around. Anyway the gauge is now stuff need a new one but has anyone had this problem and know what it could be or how to fix it. Thanks

[Pyro]

Take the bottom cap off and you should see a little red plastic disc looking thing (Seat) have a close look at thise and see if there is any dirt on this and clean it off.