Join Date: Oct 2016
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I have the same machine and have no spotting issues at all. IMO, avoid using dish soap. It is WAY too harsh and is designed to remove grease, but it does have sheeting agents in it which is generally citric acid. You can get the same, exact affect but adding a little jet-dry to any automotive or marine based wash, without the harshness of a dish soap.
I use 303 vinyl cleaner and treatment. I also use a stellar product made by Honda. Its in a spray can, is pretty cheap and works amazing. You can also use in on the seats and on the plastic. I get ZERO water spots on my black machine after I wash it off. The key is to have a healthy coating of wax and the Honda spray contains carnuba wax.
IF, you get water spots that you can't remove, take some vinegar dilute with water, and add a few drops of jet dry (it will help with the sheeting and drying process). Just rinse off and the spots will vanish and you won't even have to dry the machine.