To clean zerodust

If it's not too bad, take a few drops of water and rub around the top of the bubble. pat dry with something.

Try to avoid getting it around the edge, as the bubble part will eventually seperate from the backing.

Just take it out of the box and gently clean with water. Let it air dry than put it back in.

I have done this every couple month with no issues at all.

The official instructions:
When the cleaning element begins looking a little grungy, just wash it in warm water with a little bit of neutral detergent. Dust is easily removed, and you can use Zerodust over and over for a VERY long time.

I usually use distilled water to clean it.
Very nice cleaning gadget.

The rubber part is not attached to the paper backing. I use some tap water and one drop of liquid dish soap and pat dry. I use this after I clean the stylus with Magic Eraser.