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You will get every different answer possible to this question. For me I dont have any specific sequence. I blow on the call probably 30 seconds or so and scan my area about the same amount of time or just enough to catch my breath. The post above mine questions why hand callers will leave a e caller on constantly but pause with hand calls. The answer to that for me is that if I dont pause here and there with my hand calls I will pass out from lack of oxygen. A day long trip blowing calls and i'm wore out.