I wash it before my spring and fall detailing sessions. After that, only as needed, maybe 4 to 6 more times a year. We have long spells of cloudy weather here with fairly often rain or snow (except 5 week summer droughts that seems consistent lately). It is unusual for a washed daily driver to stay clean more than about 4 days. So why waste the time? Plus, I am a proponent of touching your paint the least amount reasonable.