I suppose you could clean wire this way but it would be a very inefficient way to clean. You have program a path for the laser cutter to follow and it would only follow that path. You would also have to place your wire in that exact same path. Also also, the focal point of the laser is a very fine point (forgive me if I don't know how small :p). It's reaaaaally tiny. The best analogy I can think of is that it's like blindfolding someone and making him clean a floor with a toothbrush. Is it possible? Sure. Will it take forever? Yes. Will it be inaccurate if you gave the machine even the tinniest of nudges? Absolutely.