A 2 gram back flush for Sawyer Squeeze Water Filter: : http://www.backpackinglight.com/cgi-bin/backpackinglight/forums/thread_display.html?forum_thread_id=78861
PS: If you have a later model of the Sawyer (I have the Mini which filters down to 1 micron so excludes viruses and all bacteria), you can source a different water bottle cap to do the same thing. See picture below:
See also:
http://www.theultralighthiker.com/water-filter/
http://www.theultralighthiker.com/survival-still/
http://www.theultralighthiker.com/rivers-in-the-sky-never-die-of-thirst/
http://www.theultralighthiker.com/dehydrated-water/
http://www.theultralighthiker.com/sawyer-water-filter/
http://www.theultralighthiker.com/water-hiking-desalinator/
http://www.theultralighthiker.com/collecting-water/
