How to make A air freshner out of downy unstoppables cheaper then Febreeze: here are the steps to do it Step 1. Put in-wash scent booster beads into an empty spray bottle. Step 2. Add water to spray bottle. Step 3. Let the bottle sit over night, allowing time for the scent booster beads to dissolve. Step 4. Shake spray bottle to mix the water and dissolved beads—All done!