That would be nice. I have recently done fixer tests on my current fixer but not on the ones on the top shelves of my garage no. I won't be able to get to it until the temperatures moderate a little so I can get out there and move a bunch of stuff to get a ladder to that high shelf. Plus the jugs are brown opaque jugs. Not sure how I'm going to see inside that. Maybe a really strong flashlight from the top or maybe holding it up to a really strong light? How long would that chemical process take to happen? How many years and would temperature factor in? It's still brutal here 85+ degrees and it's been getting cold in the winter too. Some of it is probably only a year or two old, and other bottles are much older.