Residue on straightener plates? Unplug, cool completely and wipe gently
Never clean hot straightener plates. Unplug the appliance, let it cool, wipe with a gentle cloth as directed by its maker and use it only once dry.
ghd and Dyson note that styling-product residue can collect on plates. Both recommend powering down, cooling and wiping gently. Follow your model's instructions for cloth dampness and maintenance.