How long does it last?

[fishingprogonehomebrewer]

I have some star-san in a spray bottle

 

[fishingprogonehomebrewer]

Sorry hit send by mistake. How long will star san last in the spray bottle? Should I make fresh each time? Thanks in advance

 

[masskrug]

Mine sits for 3 weeks in between each bottle/brew session. Then I usually use it up and replace it with fresh.

 

[alien]

It's fine as long as the pH remains below 3.

 

[cluckk]

From what I have read, if you shake it up and it foams up easily then it is still good. I always refill my spray bottle each brew session and then use it for spraying down my beer thief, new airlocks, etc. Next brew day, when I make a fresh batch I empty and refill the spray bottle. Since I brew every two to three weeks, the stuff doesn't get a chance to get old. I also make a spray bottle of cleanser that I use to spray empty bottles before putting away.