Goodmorning all,

I'm a big honda fan in the netherlands, but i'm having some trouble now with my GD01. It's a honda jazz sport 1.4 DSI engine: it's giving me a really poor gas milage, it went sky high the last couple of months averaged around 7.2 l/100km. It was around 5.7 l/100km in the same period last year (with the same weather conditions), and the same driving style.
I always change gear at around 2500-2700 rpm (a typical sunday driver hahaha), so the dealer doesn't offer me a solution except for changing the sparks plugs wich i did last week.
And there is this other thing, with de-fogging the car. It foggs up really fast and with more than 1 person in the car i can't get the windows clear (set to fresh air, blower on 4, with or without airco and change the pollenfilter 2 weeks ago) it doesn't matter what i do, the only solution is driving with all windows open.
So if anybody has some suggestions, getting a bit desperate here