Keep it in the fridge to keep it for a long time.
When testing, leave it out for twenty minutes so the liquid has room temperature.
After testing, put it back ;-) so it will last for a long time
Rgds
aj
Indeed! We have been recommending people store them in the fridge from the day we released them. It slows down the degradation that causes the browning. Seems others have now picked up on the idea.
Good show.
B.
Chemical Generation