Forms :: How To Close Notify Icon Cleanly

I noticed that when the app closed the icon remained on the taskbar until the mouse was hovered over it, so added this:-
If Not AlarmClockNotify Is Nothing Then
AlarmClockNotify.Dispose()
End If
.. and that did the job.

Then I noticed that if the balloon was showing at the time the app was closed, the icon went - but the balloon stayed, so added this:-
If Not AlarmClockNotify Is Nothing Then
AlarmClockNotify.Visible = False
AlarmClockNotify.Visible = True
AlarmClockNotify.Dispose()
End If

and everything worked fine until the app was closed WITHOUT the icon showing (only dislays if an alarm is pending in the next x days) - then it throws and 'object reference not set to an instance of an object' - odd because it passed straight through the 'not is nothing' If statement.