Recently my friend told me of this trick.
It's an eco-friendly, zero-cost solution to cleaning your computer keyboard!
Step 1: Use Sticky Notes Into the Cracks in the Keyboard
The thin paper can fit into the cracks between keyboards very easily.
Also, the sticky side of the paper adheres to any loose dust without leaving the sticky substance on the keyboard itself.
Step 2: Throw It Away
Once you're done, throw it away in a recycle bin.