I am brand new to looming and I am trying to make a basic hat. I am having some trouble however because my finalized rows are very loose and open. I am hoping for a more solid product. When I try to tighten up the yarn it gets too difficult to lift the bottom row of yarn up. Any advice? Maybe I need to use a thicker yarn? I am using Lion Brand Yarn titled "Fisherman;s wool". Thanks for any advice!!!