Welcome to the 10K Steps a Day team! Looking forward to getting to know you. Spark research has shown that people who use the threads and posts tend to lose more weight on average than those who do not. So what are you waiting for? Start posting and get your weight loss going!
Saw your comment on the SPAT team, and I had the loose clip problem also. Take it apart, and "gently" squeeze on the bend of the clip with a pair of pliers, careful to not break it. Put your SPAT back together and it should be nice and tight now.
I always wear mine on my shoe as it gets the best results there.