Hi, I have had some issues with the Nancy-520 dye (it has expired but it had not been open), which I see it got like a crystall once opened (it was stored in 4 ºC). I could see that if it was slightly warmed, it melted and could be used as normal, but when I put it back to refrigeration, it solidifies again, but 2 - 8 ºC is the suggested storage temperature, so it should not get solidified and instead be liquid. Has anyone had an issue like this with that or another dye? Thanks for your help in advance.