Wick Stickums are a double-sided glue dot (disc) which is used to secure your wick to a jar.  Just remove the paper on one side of the stickum, stick to the wick tab, remove the paper on the other side, and stick to the centre of your container.  Wick stickums are totally hidden by the wick tab.  Very highly adhesive, they will not lose their grip when wax has been poured at a reasonable temperature.