Saniclean is effective for how long?

I have a spray bottle of SaniClean that I mixed up a couple of weeks ago. How long is this mixed, diluted SaniClean effective? Can I use this spray bottle of SaniClean indefinitely? Or maybe just for a few days?

IIRC, Saniclean is basically just a low-foam version of Star San that still uses phosphoric acid as the prime component. If that's the case, it should have just about the same shelf life as Star San, which is to say almost indefinate as long as the pH remains <3.

If you used distilled or RO water to mix it up, it'll probably be good for several months. If you used soft tap water, it'll probably last a few weeks. If you have hard tap water, a week at best.