CO Contact Cleaner is a unique blend of petroleum-distillates which provides a suitable precision cleaner forsensitive electronics. CO Contact Cleaner is a cost effective alternative to all contact cleaners. CO ContactCleaner evaporates quickly, leaves no reside and is safe to use on all plastics.II. ApplicationsRecommended for the cleaning of telephones, PCs, edge connectors, tape heads, buss bars and circuits. Effectivelyremoves dirt, dust, light oils and fingerprints from contacts, printed circuit boards, switches and breakers.