I have just had a new frame with a foxrp23 shock. It works great, but I think it is leaking air from the valve. It was leaking a lot at first but I tightened up the thing inside which helped. However, if I bounce on the suspension and wait a couple of minutes I can hear a little hiss from the valve. If I check the pressure it seems exactly the same but it may be leaking just a little air. Has anyone encountered a problem like this before, and does anyone have some suggestions? Thanks