Put some vaseline [or similar] on the lens and, if anyone complains they can't see you properly, say it must be scratched. Alternately. Go billy-bollock naked

Put some vaseline [or similar] on the lens and, if anyone complains they can't see you properly, say it must be scratched. Alternately. Go billy-bollock naked and say you never wear clothes at home. They'll soon ask you to turn your camera off again.