I use kevlar tires and check them for wear and debris every Saturday. Inflation kept up. I can usually go a year without a flat. There's some badness on my route (intentional or just bad luck is anyone's guess). I actually walked the stretch from Sunnybrook north to the overpass during lunch and didn't find anything. I'm suspecting construction debris on Sunnybrook somewhere and will check that out tomorrow. Not even slime can stop staples and tacks.
Thanks. I'm just venting