Pine needles can be a nuisance when they’re left on rocks. Not only do they collect dirt and dust, but they can also create a breeding ground for mosquitoes. To clean up the needles, you’ll need to:

  1. Remove as much of the dirt and dust as possible. This can be done with a brush, a vacuum cleaner, or your hands.
  2. Use a plunger to suction onto the needles and pull until all of the dirt and dust has been removed.
  3. Rinse off the area with water or soap and dry it off.