First of all, the dash top is carefully finished to reduce glare. Anything which is put on it which may induce glare will caurse the worse problems you can imagine. Best, IMO, is a lightly damp clean towell. Keep that dull finish; that's its purpose -- reduce glare.
Same for the seats (yes, on the leather!). Supplement with some mild soap and water when needed. Keep all that other "junk" off them; the dye WILL bleed out with most of that stuff. The day of the older kinds of leather which wore like iron are long gone. If you want to mess up your leather, use some of those special leather preps. This current stuff just can't handle that stuff any longer.
And be cool about waxing and claying a newly finished car for a good bit. That includes Zaino. Paint, even clear coat, needs to season and cure.
As for windows, a spray bottle of water and white vinegar (about a cup to a gallon) will take care of both inside and out quite nicely. Test your additional tinting material inside, FIRST to be sure it can stand the vinegar mix.
Washing any car, good old water, liberally applied with minimal rubbing, is just great. When you do rub, do it with the length of the car. Avoid circular motions totally; eventually, that will cause very ugly noticeable scratch rings on the finish. Some specifically made auto soap may be OK, but make sure it's mild and not alkaline. See your owner's manual; DC is quite specific on what they recommend. And their rec's work.