Are traceless stickers really traceless? Why?
There are a wide variety of traceless stickers on the market, but "traceless" is not absolute. Its "traceless" effect depends on the patch material, adhesion and personal skin characteristics. Patches made of different materials will have different degrees of fit and residue on different skin types. Choose a traceless patch that suits your skin type and use it correctly to minimize traces. Do not blindly pursue "no trace", the actual effect should be the standard.