Default Battery Indicator stuck.... How to reset?

Hi there everyone. I've been having an annoying problem lately. I have a BLU Dash 5.0 updated to Kitkat 4.4.2. The problem is that sometimes my battery indicator gets stuck in a certain percentage every now and then I don't use the phone for a while. Say, yesterday it was stuck at 85% for like 2 hours, after that it started to drain quickly to around 81% in like 20 minutes, which would be a reasonable amount of juice left.

However, sometimes it gets stuck and won't lower until I take the battery out, which is really annoying and I don't want to keep doing this because I don't want to ruin my back cover. I haven't gotten a solid answer on what I should do. A hard reset might be my last resort due to my large amount of apps and progress so far.

Any ideas? Thank you