What does plasma work best on?

[hoegs]

Plasmas are highly reactive mixtures of gas species consisting of large
concentrations of ions, electrons, free radicals, and other neutral
species.

Plasma is a proven technology, which provides an efficient, economic,
environmentally friendly, and versatile technique for modifying the
surface properties of materials.

Plasma works best at removing light organic films, oxide layers,
particles, or residues from other non-plasma cleaning processes.