I washed my Model X this weekend. It is a pain to wash. On a regular car you open a door and stand on the edge to wash the top. You can't do this with a Falcon Wing Door. I had to get out a ladder to get the top. (right in the middle of washing the top, the door automatically opens and slams against the latter almost knocking me off, if course I should have not had the fob in my pocket. ) It also took me as long to wash the wheels as it took to wash the rest of the car. I have the 20" helix wheels. It is easy to get to the spokes (I guess spokes is the right name) unlike my current car which are hard to clean. But inside of the wheels rims is also visible and have to be washed. My hands just barely fits between the some of spokes but not others. You have to reach alway up to your elbow to get it the inside the rim clean. In addition to the calipers, there are a lot of other parts which are exposed and some not even coated which need to be cleaned regularly. I have some wheel brushes but none of them would do an acceptable jobs. As you probably already know you try to never let water dry on any part of the car. The water from your faucet both well water and public utility water contains minerals. You can really see this if you leave water standing on the window then try to get the stains off. Depending on where you live rain water can be even worse, especially in a heavily populated area where there is more pollution. I live near the ocean where there is little pollution but I am only 500 feet away from the water and the rain and wind contains salt. Some people have water softners but they usually also contain salt. I recently purchased a hand car blower/dryer which really helps get rid of most of the water droplets. It was well worth the purchase as it has multible nozzles to get into every crevice. I had my car coated with Expel and Liquid Serum but even though it causes the water to bead I still had to work fast. I am going to talk to my detailer to see if I can add GTechniq EXO Hydrophobic coating. It can be used on any shiny exterior surface (paint, windows, trim, wheels). It eliminates most of the water and you can get rid of the rest with the blow dryer or cloth. It is expensive (especially if you have someone else apply it) but it lasts about two years before it needs to be reapplied. It makes the surface even shinier than the Liquid Serum.