Dirt and grime can build up on the contact points for flash media readers. Even after you've removed all the visible dust with compressed air cans, contaminates can still be lurking outside the reach of conventional cleaning methods. Even if the slot looks clean there can still be years of grime left. But now you can finally get card reader factory clean! The LAserline Clear Connections 4-in-1 media card cleaner features a Compact Flash, USB, Memory Stick, and SD-Card cleaners in a handy swiss army knife style package.