Freezer Frost Buildup - 2018 2910D

On our recent trip to the gulf coast of Florida (and first full use of the RV refrigerator), I noticed a pretty heavy buildup of frost on the fins of the freezer (the humidity at home and in Florida was typically terrible).  Once we got home and unloaded the freezer I forgot about the frost and ended up with a pond on the freezer floor - it's obviously sealed well!.  I've never seen a frost buildup as heavy as this on any of our previous RVs. 

1.  What can I do to eliminate the frost buildup?
2.  Is there a quick way to get rid of it after turning the freezer off?
3.  Anyone know of a pan that fits under the fins that could catch the water as it melts?

Thanks!

Yesterday, I called Norcold about frost/ice build up in our 7XR refrigerator (2018/2910D).  It turns out there is a warranty repair for "sagging doors" and bad door seals - either of which (or both) can allow moist, humid air to enter the compartments (refrigerator and freezer) and hasten the buildup of ice on the fins.  After confirming I had registered my warranty, they advised a door seal/door sag repair kit would be sent to my local RV shop for installation at no cost.  They also mentioned that there's a heat cycle that occurs every 49 hrs of continuous use to melt any accumulated frost - water is accumulated in a molded plastic tray against the back of the refrigerator and drained through a rubber tube with a pin hole located in the capped end of a drain tube.  I checked the drain tube for the water tray (access through the outdoor removable panel behind the refrigerator) to make sure it wasn't clogged up (it wasn't). 

If you purchase a new unit, please take the time to go through the pounds of literature in the owner's bag you receive at pickup.  There are at least 2 or 3 warranty registration cards that need to be filled out and mailed back to the mfr. It might save you some $$$!