I'm thinking my problem is that i'm using the same 1 1/2 ribbon for the center as it matches the rest of the polka dot bow. Thanks for the instructions, they are really great will for sure help keep bows the bows in my little ones hair. I only wish I'd found them sooner.
Now I have to go back and use your technique for all the past bows I've made. I'll be sure to post pictures of my pinwheel bows when I finish.