In truth, I have noticed that most things I make don't degrade. I have gone back to my vault several times and inspected all of my creations. Those that were made before becoming an Archfey, were quite degraded, faded, or inert. Anything after becoming an Archfey, nearly perfect. Even my sword that I offered during Samhain was in near perfect condition besides the lack of magic since the arithmancy was cut from the break. 