Block rocker bluetooth button is not working, what do I do?

The speaker worked perfectly in the beginning, then a few months later the button that you have to press for bluetooth stopped working. Usually when I press the button the bluetooth sign would blink on the speaker to connect to the phone device. Now it does not do that anymore and i am not able to connect my phone. So now i have to use a aux cord but I want to know why it is not working and how to fix it.
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