Alright now I have a problem... I made up a batch of clen at 1mg/ml for storage with adequate BA to have 1% once dilluted back to 100mcg/ml... now I made a few bottles and gave them to my friends and they are all saying it isn't working! NOTHING. They don't know each other so I'm sure they aren't making it up so what gives??? Was the concentration ruined by being stored with so much BA??? I don't know what did it but any ideas??? I need to figure this out... now on my next batch I'll make it at regular concentrations but is there another preservative we can use besides Benzyl Alchohol??? I need some real chemists help here.... Thanks!