Mixing Creatine Question

I have never used creatine before and just bought some from here. It says on the directions to drink immediately after mixing. Is this really that important? Will I being missing out on anything if I mix it with Surge at the beginning of my workout, sip on half throughout, then chug the rest when I’m done?

Put it in just prior to drinking it Creatine once mixed has a tendency to convert to a waste product creatinine

Phill