A method of surface treating a fluid dispenser device, said method comprising a step of modifying at least one surface to be treated of at least a portion of said device in contact with said fluid by ionic implantation using multi-charged and multi-energy ion beams, said modified surface to be treated having non-stick properties for said fluid, said multi-charged ions being selected from helium (He), nitrogen (N), oxygen (O), neon (Ne), argon (Ar), krypton (Kr), and xenon (Xe), ionic implantation being carried out to a depth of 0 μm to 3 μm.