The black FilterKlear Filter Cleaner from Lenspen is a pocketable pen designed to clean digital camera filters in the most effective and safest manner possible. No harsh solvents or abrasives are employed. On one end of the FilterKlear is the cleaning tip which contains microscopic 'invisible" carbon particles that you cannot see. This carbon can absorb and remove fingerprint oil and smudges from your filter. On the other end of the FilterKlear is a soft retractable brush that can dislodge dust that's on top of a filter.
The protective cap contains a pad filled with the "invisible" carbon so each time you place the cap on the tip, the tip is replenished. The cap contains enough of this extremely fine carbon for at least 500 cleanings.
The FilterKlear will substantially reduce static charge on the filters surface which is important, as electrostatic charge attracts dust and causes it to adhere to glass surfaces. The FilterKlear's usefulness is also unaffected by temperature extremes.