Good morning, okay. IPA only stays for a while when wiping the surface of the mobile phone, because its boiling point is about the same as that of absolute ethanol and no residue remains after it evaporates. Moreover, IPA itself is almost non-toxic to the human body. Even if it comes into contact with the skin for a long time, it will only cause fat dissolution and dryness. If it may cause allergies, please refer to it as appropriate. You can think of it as the same compound as the alcohol in liquor.