Hi. I am a fairly new knitter and I find myself usually knitting quite tightly. I am currently knitting my second pair of mittens and have noticed that my edge is a little loose when joining in the loop. May I know how I can rectify this problem? Pictures of mittens knitted by other people seem to have a uniform edge while mine is a little wonky. I have tried pulling as hard as possible when joining but the issue still comes up on every mitten I knit. Is there any special technique or tutorial I can follow?