I hardly ever do a real wash of my vehicles. When the weather is not being a SOB and it's nice and dry I dust them off with my California Duster and them wipe them down with a micro fiber towel and spray bottle of water (usually two or three times a week). After being driven in the rain I just use the spray bottle of water and a nice thick terry towel to wipe everything down. Then I usually follow that with a spray wax or detailer. In the winter time temps permitting I will go to the do it yourself car wash and spray soap it and wipe it with my wash mitt. If there is snow and salt on the roads I just go to the coin wash every few days and hose them off with water. Clay bar, wax and polish twice a year (before winter and after winter). My 12 year old Jeep and 6 year old Mazda 6 still look great and they have been been outside everyday since they were new. The Malibu will get the same treatment.