The only thing dusters do is blow large particles around. On a patch cord, this may be effective, but inside a port this can result in those same particles settling elsewhere. Dusters are ineffective on smaller, statically charged particles and totally useless on oil based contaminants such as buffer gel or body oil. Last, dusters often expel a propellant that becomes a whole new contaminant that now requires an effective cleaning process to remove. Thinking New Equals Clean Do not be lulled into thinking that end faces on factory terminated patch cords or pigtails will be clean when they are brand new and covered with a dust cap. Though dust caps are great at preventing damage to the end face, the caps themselves can be a source of contamination. The plastic used to create dust caps will outgas a residue as its plasticizers deteriorate over time and the surface of the cap may contain mold release substances used in their high speed production process. HTB15Am.JFXXXXX9XVXXq6xXFXXX5/Professional-Customize-fiber-optic-cable-meter-price.jpg' alt='All About Fiber Optic Installation Cost' title='All About Fiber Optic Installation Cost' />Dont be surprised to find a contaminated end face upon removal of a protective cap. For repeatable and reliable end face cleaning, always use Fluke Networks tools to follow the recommended wet and dry process.