My oldest untried I determined was probably a year old it is called Haze Glaze by Windstine. It is so pretty I don't know why I haven't tried it before. It was starting to thicken so I put some polish thinner and it just went on great. I love it. In doing this challenge though I do realize I am going to have to have a blog sale soon. I have a whole bunch of things coming in but nothing is going out. It might take me some time to let go but it must be done.