Thank you for your feedback.
We regret to hear that you're unsatisfied with the ION681. The ION681 is a thermal-peltier type dehumidifier that works best in warm to moderate climates.
As we are unaware of your location, we can't be certain if you're in an area where it is colder at night. If you are in area that is colder, we recommend to purchase a dessicant type dehumidifier instead as they are work best in both cold and warmer climates.
For a camper, the smallest model we have is the ION610 but it is relatively bulkier compared to the ION681. You can read more about it here:
If you'd like to upgrade from the ION681 to the ION610, please e-mail us at firstname.lastname@example.org to discuss your options.