I am using the foot loop style of shirt garters and I really like them. However, the clips that attach to the shirt are a pain in the neck. Is there any trick to make them stay looped over the shirt material? They usually don't move on me once I have been in the shirt for a couple hours but they will pop off when I put them on a new shirt or periodically if I put my hand in my pocket and knock them off. Any tricks for keeping them within the metal clip?