or you could just discipline the dog. its like them owners that just let there dam dog bark all day in the garden, i have a dog and i dont mind him barking when we have a play fight or someones at the door, but its dam annoying any other time
just by a water bottle squirter, ever time he does it squirt a bit of water. you will be amazed how effective a squirt of water is. if he associates the tank licking with a squirt of water he will soon stop, but you need to keep it up, any break will confuse him.