To answer both posts 2 and 3 about the blix, it would help to know the brand.
Now, try this.
Prewet, Develop, Stop (1 - 2% Acetic Acid), Blix 2' 100F, wash for up to 4 minutes at 100 F.
This is a trial process to eliminate blix problems. If it works, then you can go back to the regular wash times, but I use up to 10 minutes at 85 F after a 100 F rinse.
All blixes are NOT created equal and can result in yellow red stain (rust) due to iron retention.