I have had a nitro set up for some time, I like a nitro beer on occasion but it certainly is not an everyday thing for me therefore I had an irish stout on my nitro tap for a long time. I won't admit to how long but it poured and tasted great from the time I tapped until I poured. I recently brewed a vanilla porter for the nitro tap, it was brewed at the same time I made an IPA, my normal procedure is to force carb outside the kegerator. I wasn't thinking and set them both to carb to about 2.4 volumes so I am fairly certain I over carbonated the nitro beer. I think a stout is supposed to be closer to 1.4 volumes. Would this be the reason that I am getting far too much foam out of my nitro tap? I know nitro taps foam and then surge leaving a nice creamy head but I am getting half of glass of head and half a glass of beer.