Dexcom G4 durability (after 7 days)

So we've been using G4 since 2012.
For some reason, sensor durability went down a bit this spring, typically sensor lasts 8-9 days. After that its continuous ??? throughout the day.

It hasnt always been like that, last year one could easily push it to 10-14 days or even more.

Has anybody else experienced this?

Mine's gone up.

I regularly get 14 days out of a sensor... lately, I've been getting 2.5 - 3 weeks.