Why are you complaining every fucking couple posts dude just email them directly or move onWhen QSC had reconstitution issues with a batch of cloudy Tesa, they went back to the source and the chemists pointed to an issue with PH, presumably overcome with the correct PH reconstitution liquid.
Sigma really ought to address this, leaving customers hanging is not a good look. Go back to the source and find out how this product can be properly reconstituted.