I use Tri-Flow, it is bit expensive. When mine starts to get jerky, I too clean the tracks and lube them up. Usually I am good for about a season.
I saw a video recently posted on here, that states that we open our awnings incorrectly. Not sure how much I believe it, and plan to speak with a couple of our design engineers and suppliers. But if it is correct, your jerking action could be the struts. According to the video, it says open the awning a foot or two. Stop, let it rest for a moment, then continue. It says that the gas in the struts need time to equalibrate. Now I work for a major company, and I am involved in designing and building custom machines for internal use. We use struts on covers all the time, and I have never heard of this.
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