Ever noticed how fast "ant damaged" timber will dull a saw? Being that I don't have, and have never been told a formal answer as to why this happens...I came up with my own!
Here it goes...and please set me on fire if I m nowhere near right. Ok, so the ant eats the wood, the acid in it's stomache break it down, changing the eaten wood's chemical composition. Something must happen that turns the sawdust...and I say sawdust because that it essentially was wood before the carpenter ants ate it, and basically comes out as saw dust from Hell.
I bet all you guys have noticed it while cutting, surely. Well I used to run Si-Chrome dipped saw bits that were actually pretty tough even in dirty logs. If I would hit a log with a carpenter ant colony in it...INSTA DULL! I mean you might as well shut her off and get out the saw jockey...cause yer dull!
disclaimer...I'm an idiot