Possible Clues:

• Turning point?
• Product package stamp
• Milk-souring warning number
• Deadline for eating food could perhaps be Tuesday
• Take advantage of past boyfriend when something goes bad
• Tuesday 7th of September off — 8th of September past it then?
• Exploitation at the hands of girlfriend at chucking-out time?
• A seedy tub that's off? It's no good after this
• See ad and buy product, finally to be cooked now?
• Food label recommendation