Pocket Lint is a crafting ingredient that was added in the June 19, 2012 Patch. It appears as a pile of dust.
Equipping the Eliminating The Impossible set will change the Pocket lint description to "...the... which...", with random characters removed, which is a part of a quote from the "The Adventure of the Copper Beeches" short story, part of The Adventures of Sherlock Holmes collection. When combined with the other items added in the June 19, 2012 Patch, the full quote reads "Think of the deeds of hellish cruelty, the hidden wickedness which may go on, year in, year out, in such places, and none the wiser."
This currently has no use in the TFHunt solving.
June 19, 2012 Patch
- [Undocumented] The Pocket Lint was added to the game.
June 29, 2012 Patch