Cryogenic treatment has value for improving structure/electrical conductance of metals so long as you don't undo it by disordering the metal structure later by heating it. Of value for wire, dubious for tubes that heat red hot.
CD's are a reflective metal film read by laser optics, not by applying voltages so no value there.
If you want to improve a CD use something like Stoplight that damps edge refracted light which can cause errors in CD reading. CD's can also film/scratch so that polishing kits can restore a degraded CD. Ring labels can help stabilize the transport horizontal axis reducing jitter as the optics read closer to the outside radius of a CD.
CD's are a reflective metal film read by laser optics, not by applying voltages so no value there.
If you want to improve a CD use something like Stoplight that damps edge refracted light which can cause errors in CD reading. CD's can also film/scratch so that polishing kits can restore a degraded CD. Ring labels can help stabilize the transport horizontal axis reducing jitter as the optics read closer to the outside radius of a CD.