5L cans? Im not sure what this is, but you could have not had a good seal? Also what was your FG, sometimes it takes 6 weeks to fully carb. I had a MRBEER stout that never fully carbed. I kept 1 to try a year later, and it was VERY carbed by that time. Really if its not carbing the only thing you can do is wait longer
Ingredients: Jamil's Taddy Porter, O'flannagin stout, 15 min extract pale ale.
Primary: BIAB Oatmeal Cookie
Kegged: Strawberry Blonde, Pale ale, Apple Cider, Pumkin ale.
"....yeast have to start growing an army to best eat the sugar, so they have a wild orgy and then make a bunch of yeast babies." - Revvy