Ensure that there are no objects left in the dry compartment of the swimming buoy. Next, smooth it out towards the opening to remove all of the air from the dry compartment. Finally, begin rolling up the buoy while pressing the cap into the mouth valve to keep it open. Warning: If there is any residual air in the dry compartment, the swimming buoy will not be able to be rolled up completely. If this happens, repeat the smoothing process and roll up the buoy again.