Herbal 'erukku' (giant Milkweed in English) lamp wicks, made from the
small fibres of the stem of the plant, have the subtle, powerful and
miraculous ability, when burned, to destroy and remove negativity from
the environment, body and the mind (Siddha medical tradition). Twisting
the cotton wicks with the erukku help the erukku wicks to burn slower
therefore last longer.