Does the BP lose potency after it's open?

[celebration 0]

Just wondering because I could swear that when I open a new bottle, the fresh BP makes my skin tingle. It's as though it is more potent. Is that possible? Does anyone else experience this or is it my imagination?

Thanks.

[sadsadsad 0]

I think it's in your head baby. Or else it's true and you can go broke only using fresh tubes.