I've been using Rapid Fixer since I developed my first roll of film back around 1970. So I know the product.

This evening I reached for my mixed jug of it. It has been about 11 months and it had finally developed precipitate so I dumped it. This batch had a decent life span; nothing out of the ordinary for me.

Opened a new box of the concentrate. I bought this June 2021 from Freestyle. The bottle was filled with milky yellowish precipitate. I opened my back up box, purchased the same day. Same thing -- useless. I have kept the concentrate new in the box for years before. 3 to 4 years? No problem. Now this. What gives? This stuff isn't cheap.