Sticking a balloon to the wall

I charge a balloon and it sticks to a wall.
But why is it attracted? When the charged balloon approaches, the charges in the wall are reoriented so that those with the opposite sign to the balloon's charge are closer to the balloon. The forces of attraction between these opposite charges and the charge on the balloon create an attraction force (that is stronger than the repulsion with the same charges). Thus the balloon is attracted towards the wall.
But why does it not fall? - The electrostatic attraction force from the wall on the balloon causes a normal force from the wall on the balloon. The normal force then causes static friction strong enough to keep the balloon in place even with gravity trying to pull it down to the ground.
So how did I charge the balloon? To charge it, I rubbed it against my hair. Rubbing two objects with different electronegativity against each other is one way of charging objects.
More on how objects can be charged here:
• Charge, Conductors, an...