I wash mine every time I come back from a trip - so about every 6 weeks ... and before someone like Ryan or dhuck jump onto it, that's right, when I say I wash it, I really mean I let the car wash guys do it at the airport!!!! LMFAO ... full of mud and crud, and they cringe everytime I pull up!! Full wash, tyre black, and full interior detail for $57 ... worth every penny to ensure my saturdays are kept free!!! lol