As mentioned in the past, I lost my father-in-law last summer and was able to inherit his hunting gear. I would like to use it and not let it just sit around and collect dust. He had two Lohman box calls (Lil Thunder and Double Thunder) As of now, they do not sound the best and I would like to try to get them sounding better. I cleaned off the old chalk and played with the lid screw but it has not helped. Any ideas as to how to make them sound better than what an old window sounds like when you shut it or are they worthless? (I can put them on display next to a few other hunting items)