What is the correct way to clean up (destroy) a socket

I am trying to destroy the socket on $scope.$destroy, but I am still having sockets stack up when closing/opening a modal. I have tried socket.disconnect() but still see polling. I have been shutting the local socketio server to make sure that reconnect errors stop after the scope is destroyed but they continue and stack every time I re-open the modal.

What is the proper way to close/disconnect and dispose of sockets when leaving the modal/route where they were used?