Two days ago, I brought in the hummingbird feeder to change the water. It was covered with ants. Last week I had bought 100 pounds of food grade diatomaceous earth, and I recalled my having read on here how someone killed ants with it. I took about a teaspoon of de and spread it at the base of the shepherds hook/pole that the feeder hangs on. Yesterday, I looked at the feeder, and, voila, not ONE ant on it of the pole or feeder. Okay, now here's the presumption/question: It seems to me that diatomaceous earth could NEVER deteriorate, so if I sprinkle a contiuous one-inch-wide line of it all the way around my house/garage no ants, spiders, etc., could ever cross the line and live. Wadya think?