the last time i took my car into
mckenna porsche to get a faulty headlight sensor taken care of, and when i was there i asked them to teach me how to open up to clean the third brake light and they said they had couldn't do that, but however, they can charge me an obscene amount of money to detail my car and clean the third brake light for me. i said to hell with that. i will try the compressed air idea mentioned here.