The mask is used after cleansing and before serums, on clean, dry, makeup-free skin. The optional conductive gel improves comfort and diffusion on dry skin.
Three to five 10-minute sessions per week is the reference pace. Consistency matters more than frequency: three sessions kept up every week beats seven in one week and none the next.
Avoid retinol or acids right before the session: apply them afterward, never before, since some actives are photosensitizing.