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Welcome to the forums!
Try a restart. Do it at least 3 times.
Restart
http://help.fitbit.com/articles/en_US/Help_article/1186/?q=restart&l=en_US&fs=Search&pn=1
If that doesn't help
Contact Support
http://help.fitbit.com/?cu=1
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Community Moderator Alumni are previous members of the Moderation Team, which ensures conversations are friendly, factual, and on-topic. Moderators are here to answer questions, escalate bugs, and make sure your voice is heard by the larger Fitbit team. Learn more
Welcome to the Forums @Rhonda19843 and @WendyB thanks for stopping by.
As recommended, please restart your Blaze but confirm you are doing the following to do it:
- Press and hold the Back and Select buttons (left and bottom right) until you see the Fitbit logo on the screen. This should take less than 10 seconds.
- Let go of the buttons.
Let me know the outcome. 
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Community Moderators ensure that conversations are friendly, factual, and on-topic. We're here to answer questions, escalate bugs, and make sure your voice is heard by the larger Fitbit team. Learn more
Hey there @Rhonda19843! Thanks for confirming that you've done a restart. I've sent you a PM with further instructions.
Have a great week! 
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