I want to run down what I have experienced with my Andersen recently. So, I have had my Andersen for about a year. I now have over 8,000 miles on it. At about 4,500 miles on my Andersen I began to have a great deal of noise (like what an Equal-I-zer does normally) which is not normal for an Andersen hitch. I read about the OP with a similar noise, but I cannot tell if this is the same cause. I cleaned the triangle, pin and the bottom of the ball where the triangle connects. That seemed to get rid of the problem for each of several short trips.
This last trip (3600 miles) started fine other than the light rain, but after the first night's stop the hitch got noisy again when it dried up the next day. I felt like the anti-sway was less than normal in the wind. When we got to our first real stop with internet, I contacted Andersen. I sent them photos of what the ball looked like and explained my situation.
Andersen, for their part as they have with every question I have sent, responded quickly. They told me to remove/clean and reinstall the ball cone assuming my anti-sway material was black and not red. I told them that mine is red.
They then said they would send me new anti-sway material and indicated they may just send a new hitch head. All under warranty. It seems they use a different material now and that the red material isn’t current. I was moving too often and didn't want to chance missing the fedex shipment. I also didn’t have access to all of my tools, so it was my decision to wait until I got home to work on this.
Now at home and looking closely at my anti-sway material, there is a gap between the material and the metal. That gap is about a quarter way around the ball cone. . I assume (hate doing it) that there is dirt in that gap. That cannot help anti-sway or the material. There is also what appears to be a tear of the material. The tear was not there when I sent the previous messages to Andersen. I have again contacted Andersen CS and asked what they want to do. This seems like a simple replacement of material if you have the red stuff and this problem.