Have you cleaned your chimney yet?

I haven't cleaned my chimney since last year, I can see from the ground that the cap looks clean and I have found that that's the best indicator of when it needs cleaning. In fact, the cap and the top couple of feet of exposed chimney are the only parts of my chimney that have ever really needed cleaning. What I have noticed is the amount of creosote accumulation is very dependent of the weather, even more so than our burning practices. If we have calm warm weather. and starting a fire everyday, I get little significant creosote accumulation, but if we have cold windy weather, and keep a fire burning 24/7, the cap (and top portion of the chimney) seems to creosote up relatively fast.
My theory is that the cold wind keeps the exposed portions of the chimney chilled and doesn't allow it to warm up, thus the warm moist smoke has a much greater propensity to condense on these cold metal surfaces.
One could argue that when it colder, and I'm burning 24/7 I'm bound to get more creosote simply because I'm putting more wood through the stove, but the thing is that is not always true. I have also noticed that sometimes when it's cold and we burn 24/7, when it's not windy, we don't get significant creosote accumulation. We have to get that combination of cold weather and wind before I start seeing significant deposits. In fact after one particularly windy period I remember climbing up on the roof and noticing wet dripping creosote had actually dripped off the cap and landed on the metal roof, the odd thing was that it was a foot or so away from the chimney. The only way it could have got that far away was if the wind carried it, and that was the one and only time I have every seen anything wet enough to drip off the chimney.