Hi
This is so much common to honda jazz, its
not a fault on sealant or air conditioner. If you are really sure there is no damp thing inside tha car, check the boot as well , i mean to where the emergency tyre is located (there are few jazz with water ingress on it) .
Then try to to close the re circulation button and point the air flow to passenger or footwell before you parked up in the night. Just dont forget to open the
re circulation vent/button in the morning as you drive otherwise youll get the mist in the windows. A combination of hot air and cold air from airconditioner will help demist the car instantly. Ford fiestas doesnt have this recirculation button/vent which help turn the air in constant movement in the cabin so make the air fresh all the tim in honda jazz..