I have been told that deathwatch beetles are in my wall. At least they're in some molding and I'm afraid they've spread to other parts of the home. I first started hearing a knocking sound along one wall and the plumber said it had nothing to do with my pipes. Sometimes it would stop for a week or two but then come back. Then I found holes and sawdust coming from some molding. We think it's made from cherry wood. I have it in other parts of the home too which is why I'm worried but I've only heard the sounds in this one room.

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