I didn’t want to hijack the other Star San thread so I thought I’d start another 
My water also gets cloudy when I mix in the Star San although I don’t have a foaming issue. My water is hard so I’m assuming (after reading a response on the other thread) that this is the reason for the clouding issue. Is this affecting the effectiveness of the Star San? If so, what do I need to do to correct this?
Use RO or distilled water when you mix it.
If you have hard water you can use it immediately without problems. Using RO or distilled water you can reuse and store starsan for long period of time.
I do have some in a spray bottle which I’ll discard in light of this. The stuff I mix in the sink is used within an hour.
I always have a gallon of starsan on hand that’s mixed up with distilled water. But like I said in the other thread, if it’s mixed with my tap water it’s use or lose in the same day.