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Hello everyone. I am not a beginner but I am new to chelating.

I started using citric acid to Chelate and overall it’s working great. (About a year) BUT for the second time since I began using citric acid, I’m getting crystals in my lye solution but only when I make it the night before and MOST times it does not crystallize. I typically make my solution and use it the next day. I cover it with plastic wrap over night. Sometimes I use it right away as soon as it cools enough.  In other words, sometimes it doesn’t sit over night and in that case I never have a problem.

I had this happen another time and I discarded the mix and started over.

I know my measurements were the same as always. (Barring some unusual oversight)

When I reheat it, the crystals dissolves back in *almost completely if I get it hot enough.

#1 can I use it if I get it dissolved all the way? I hope I can get it completely dissolved again

#2 what causes this to happen only intermittently?

Thanks to anyone who can help me.

Oh and I should add I use citric acid at 2%