Write the next sentence in the following story.

How to use an incentive spirometer
Put the incentive spirometer together, if necessary.
If you haven't used the device before, you may need to assemble it. Wash your hands, then remove the pieces from the plastic bags.
Stretch out the flexible tubing with the mouthpiece, then connect the side without the mouthpiece to outlet. The outlet is on the bottom right-hand side of the base.