Do you leave your gas line hooked up or unhook and run out?

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I unhook my gas line and run the gas out every time if I don't it won't start next time without taking out my plugs and cleaning them or changing them OUCH there like 4-5 bucks each. I notice that in the begin of the year it would always start the 1st time out. Then after each use I would have to clean the plugs to start it. So thats what works for me.
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