How do I know if termites are eating my house?

You awaken. The night is still; your house is dark and quiet. Your dog groans as he stirs in his sleep at the foot of your bed. You hold your breath, listening to the deafening silence. You hear nothing but your rapid heartbeat. But you know they're there. You can sense them: termites.

So how do you know if termites are eating your house?

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