I brewed a plain light wheat beer and split it in to two 5 gallon corny kegs. I added 3 cups of fresh pineapple juice ( boiled for 10 minutes) to one of the kegs. I set both kegs at 14 psi. The keg with out the pineapple was carbonated in 7 days. At 14 days I turned the pressure up to 20 psi on the pineapple keg. It was been 7 days now and I'm seeing a little bit of carbonation. Has anyone had something like this happen? Should I go to 30 or 40 psi??