Be aware of interference from other devices that can interfere with signals on the Bluetooth frequency such as:
If you’re having general performance issues with your Bluetooth device it is a great idea to try and turn off anything at all in the surrounding rooms that may be causing such interference. If having turned a whole bunch of other electronics off you find that your Bluetooth device suddenly performs well be as scientific as possible in turning on your other household appliances one at a time and as methodically as possible in order to work out which are causing a problem.