I brewed a brown ale that is about 8.5%. FG was about 1.012 if I remember correctly, then at bottling time I added a half ounce of hazelnut extract. Also added 4 oz priming sugar, boiled for a min or so. Now, 3 weeks later, I have very little carbonation. When I do a rigorous pour, I get no head, but as I drink, you can feel some slight carbonation in the liquid. I read on some site that i may want to uncap all the bottles, add a grain or 2 of dry yeast flakes and recap. the beer doesn't have too much residual sweetness, so i was thinking about adding a drop or 2 of maple syrup or molasses and adding the flakes. what do you guys think?