Bags:
Empty your scented rocks into a glass dish (ex: glass bowl, wine glass or martini glass).  Let as much oil as possible drip out of the bag and into your bowl.  After you have drained out all of the oil, simply shake or stir your rocks up and allow them to smell the room.

Jars:
Remove the lid from your jar and simply shake the jar making sure the top of your rocks have a wet look to them. 

Don't Forget!
Eventually the oil will settle down to the bottom of your jar and you will notice that your smell is not as strong as it use to be.  To strengthen your smell just give your rocks a nice shake to bring your oils back to the top.  Continue to do this as little or a much as you want, to bring the frangrance to your home.