The UV filter is a brilliant idea! I would of never thought of that. Ive kept my X70 with its cap on when not shooting and in my camera bag. My XT-1 has been everywhere beach, forest, desert, city, with many lens changes and never once I had to clean the sensor or the inner parts of the lenses due to dust or foreign objects. I'm very OCD about being very careful when changing lenses, some times I hike back to my car to swap lenses and go hike back to take the shot. I know its OK to change lenses in the field but An OCD is powerful thing... So I'm very disappointed with my X-70's newly acquired spots disorder.