JWHATCH23

i started spraying this weekend and it worked fine the first few times then it was like the bottle was empty but i just got it filled it was blowing just air into the engine no nitrous i took out the bottle and opened the valve there was a lot of nitrous left could my silinoid be bad i took it apart one of the rings was kinda bent but would that affect it i mean the silinoid still clicks when you hit the button but have no clue please help