I'm new to home brewing (5 beers) and even newer to kegging (3 beers), but I'm having some foaming issues I can't figure out. I currently have an IPA on tap, 12 PSI, 10 foot, 3/16 ID tubing, 38 degrees. First beer is 80% foam, second is perfect. I haven't sampled all time deltas when I pour, but in as little as 15-20 minutes (most likely quicker, just not sampled yet) the new pour is 80% foam. Yet always perfect if I pour within 1-2 minutes after the last pour. Any ideas?