i definately recommend stripping the car. im a bit slack and usually strip and rebuild the car every 3-4 meets. i just dust it down between, but dont expect to do a thorough clean with the car assembled. not only wont you clean everything properly, but you wont find worn out and broken parts by cleaning the car assembled. Theres been a few times ive stripped my car, expecting to simply rebuild it after a clean, to find a few parts that need replacing. its worth the effort