1.Can not use on the pure paper bag 2.Cover the protective case after use, prevent scald you. 3.It is necessary to start sealing after press for a few seconds. 4.The speed of sealing can not be too fast, otherwise it will affect the sealing effect. 5.Use 2*AA batteries.(battery not included ) 6.the bag thickness larger than 0.1cm is hard to sealing, you can slowly sealing or repeat it several times. 7.Thinner cling film needs to be folded several layers and the sealing effect will be better, or we should seal quickly. If because the package is too thin and we fusing a crack still ok, the opening also be sealed. 8.The plastic smell emanating from the heat seal is normal, not the quality problem of the sealing machine. 9.Clean the dust, water, powder, oil and so on at the opening when sealing. 10.Cannot be used continuously for more than 1 minute, To avoid overheating the battery