Hi everyone. I accidentally installed a nitrogen tank instead of a helium tank on my GC-MS last week. When I returned Monday, I realized what I had done and changed the tank back to a helium one. I was trying to purge the nitrogen out as its at 2000% on the tune, but the front inlet shuts down every time I try to turn it on due to pressure issues. Any idea on how to get rid of all the excess nitrogen? Thanks!