Storage solution for HILIC-Z column


What is the best storage solution for an Agilent InfinityLab Poroshell 120 HILIC Column (Zwitterionic)? 

I know reverse phase columns are typically stored in 100% organic like acetonitrile. But since solvent strength is opposite for HILIC, I was curious if 100% organic still makes sense?  Would 95:5 Acetonitrile:Water be better? Also curious if there are additional storage requirements for Zwitterionic. 

Thank you for your help!


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