I sure would call a professional if I were you. I worry about the little pin hole, let alone the insect frass.

Thank you, frass -- new word ;)
I poured some Ortho Home Defense liquid into the hardwood planks, and put AMDRO ant bait outside along the foundation. If that doesn't work I'll call the pest management pro.

These critters must be tiny! I saw some just outside the patio door, they're like dots.

I have carpet thyme all around the house, supposedly Thyme is one of few plants that has a natural bug repellent.