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Leave-in Conditioner/Liquid- The L in LOC stands for liquid (water) or leave-in conditioner and they are both used to provide moisture that will be sealed into your curly hair strands. For this step, you can apply either water or leave-in conditioner separately or to make it easier create a mixture of both in a spray bottle and apply to clean hair.
https://truegloryhair.com/blogs/true-insider-blog/how-the-loc-method-can-increase-the-life-of-your-curly-extensions