I recently bought furniture to make over. It did have a ton of spiders. I took out the drawers, flipped it over and cleaned everything I could out. This weeks little round oval things have been showing up on it. They are in clumps and easily fall off. They don't move. When I step on them they seem intact and don't get squished. Not sure if they're eggs or maybe little pieces of wood from something burrowing.
Bexar County Texas
They may be drywood termite pellets. You can find more information here: