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Mine sync fine daily. Se these treads for help
https://community.fitbit.com/t5/Flex/syncing-issue-with-my-Flex/m-p/1701255#M163030
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Hey there @Regret1 and @WendyB! A warm welcome to our new friend, I'm happy to see you here in the Forums @Regret1! Those threads have amazing tips for you to know. You can try to restart your Surge and phone too. Sometimes it is just the Bluetooth that is getting stuck while syncing, so force quite the Fitbit App and reboot Bluetooth too. 
Force Sync is done by going to Fitbit App > Tap on Account (upper right corner) > Surge > Sync Now.
In case that you using an Android phone, also check your phone Permissions and leave location on to keep syncing with your phone, you can read more about this suggestions in this post. 
Which type of phone do you have? 
See you around! 
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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
Thanks for taking the time to provide us with your feedback @Bluemoon69! Welcome to the Forums! 
I appreciate the time you took to troubleshoot this issue. If you already tried the steps above I'd like to confirm with you with device you're using to sync your Fitbit! Please add any relevant information about the issue or if you're getting a message or error. I'm very interested in helping you out with this.
Have a good one!
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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
Yeiii! So glad to know that! What exactly did you do to fix it? If any of the posts above helped, please mark it as the Accepted Solutions. Marking posts as solutions is a great way of thanking another community member, while also highlighting their solution; so that it may be discovered more easily by other community member's facing the same questions or issues as you. 
See you around, keep stepping!
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