Flux removers (defluxers) remove flux residues and other contaminants left by manufacture, rework, or repair of printed circuit boards. Residues from higher, lead-free temperatures are more baked on and harder to clean. G3, Ecoline and Precision flux removers have been proven very effective at removing fluxes baked on at lead-free temperatures. - Microcomponents and fine pitch leads are delicate and easily damaged, so brushing and scrubbing should be avoided if possible. Both G3, Ecoline and Precision have a powerful spray and strong solvent that blasts off residues and cleans areas under components that a brush cannot touch.