Unfortunately you allowed yourself to get angry and did a stupid thing in 'undoing your work'. Legally she could report you to the police for property damage!!
Remember that the internet is a massively powerful thing these days. I know custys can be stupid and annoying but they hold the power.
If I were you I would go back, apologise big time, explain you were having a bad day, give her money back, maybe even a little bunch of flowers and offer to re clean all the windows - no charge.
The thing to do is learn that communication is very important. i.e. when she asked you to clean her windows your first question should be something like 'would you like a regular clean or a one off?' Then you both know what you are getting into. OK so not everyone will say one off as many know it will be more expensive, so they might try and trick you but that's life.
Above all learn that customers are important no matter what you think of them. They can all type on a keyboard or tell family and friends.
You do have the power to refuse work and drop custys but you have to be polite and professional at all times.