I use an Ultra 2 Vest, and it is new (purchased from Tiffen in early 2014). I've been using it almost 5 days a week now for the past 6 months. Recently, it has been making a little more noise than normal when under load. I've looked through the Vest portion of the forum as well as a few search variations.
Usually, the noise is along the lines of a squeak, vibrating plastic on metal or metal on metal. I hear it most often when the rig is away from my body or when booming. I have tried to pin point the noise to no avail. It sounds like it is coming from the socket block or center spar.
I usually clean the vest once a month by completely dissasembling it and going in all the nooks and cranies with a tooth brush or cotton swab to remove and dust or debry that might settle in there. I also spray a little Bar Keeper's Friend on a paper towel and rub down any spots that are hard to remove. Before reassembly it gets a little bit of grease in the parts that move the most.
Alas, this most recent go had very little affect. I also went through and completely tighten it down. Every screw I could find was twisted into place. I do find this vest to have screws come loose more than other vests that I have used.
Any thoughts on the noise? Or a way to keep the screws from undoing themselves (a little thread lock or clear nail polish)?