This is my short and frugal tip of the day.
Have an “empty” essential oil bottle?
Open the bottle all the way, including taking off the stopper and put it in a ceramic up.
Boil some water. Once it is boiling, pour the water in the cup. Make sure the bottle fills. Do just enough to cover the bottle.
Now place it in a room and it will diffuse the left over oil and you will still get the benefit from it.
When the water cools, I add it to my ultrasonic diffuser and continue to use it.
Now the bottle is clean and ready for the recycle. Plus, you didn’t waste a drop! YAY!