The system is meant to be used once per week (particularly Step 1: Glycolic Prep for Nails); however, if your unpolished nails need some extra shine mid-week, you can use surface 03 of the priming wand, followed by Step 3 to give your nails a shine boost! And if your nails are already polished, you can simply use Step 3 for an extra hydration boost for your cuticles.