At times, your Roku remote might get un-paired from your device automatically due to which you have to face the Roku remote not working problem. In addition to that, there could be a few other reasons that are responsible for the same issue such as low batteries, obstructions, etc. However, re-pairing it with your device will fix the issue. If that doesn’t help and you still cannot use your Roku remote, then you should reset it. To do so, take out the batteries from it, unplug your device, plug it back after some time, insert the batteries and press the power button.