Got a job lot of 4x10L of AFGA RA4 chemicals recently, all was going reasonably well including me getting my head around a starter. Dev works fine and I am able to top up at a reasonable pace. The one that has thrown me is the BLIX is losing its zing very rapidly! When I made up a fresh batch of chemicals I did a blank sheet so I could compare the white base, after around five sheets of 12x12 I am getting a grey base, probably around 2%. The BLIX is losing it too quickly and I am not sure why? I am using a 16x12 Nova running the chems at 38c I dev for 45 seconds, stop for 45 and BLIX for 45. I have tried increasing the time in the BLIX to 60 and I am doing all this in complete darkness. Am I getting some sort of contamination possibly from the stop or is the BLIX just passed its best before? The chemicals although sealed are around two years old, the dev is fine, which is the first I would expect to go. What Can I do to resolve this, should I source some BLIX independently and chuck this lot or is this norm, just my topping up progress is wrong?