How long will azamax last after mixing?

I have some azamax left in a spray bottle from a week ago, I'm just using it to knock down some thrips that got a little rowdy. do I need to mix up a new batch if I want to do a second round or does it not break down after mixing?

mine seems to work fine still. sits for up to a few weeks at a time.

It says to but I have left it sit and reused it.I just gave it a good shaking.

I always thought it needed to be used within 24 hours.........

until it stops working the way i do it, i will continue to let it sit. no reason to throw away money, if the money is still good.