Hi,
You probably can't, since it's up to the producer themselves that they now release "watery" non-intensive batches where the scent disappears quickly. I have many other numbers from the same producer at home that work perfectly fine though.
I had an older version of 68 that was 9 months old (from a trip) that recently became worthless, and a mini from a kit was the same after a short time, and the new replacement from you was exactly the same from the moment the packaging was opened.
I can use the old one bought at an airport even though I'm allergic to perfume because it's as mild as a budget scented candle from Ikea.
Before, my daughter sprayed indoors and I complained that it lingered in the hallway for a long time, but now the magic is gone. Got a tip to buy body butter instead. No idea why it would last better.