A third option may be to add shrinkwrap plastic to the areas to prevent ice from forming.
From the newscientist.com
Shrink wrap, also shrinkwrap or shrink film, is a material made up of polymer plastic film.
From the en.wikipedia.org
You have to look on the packaging shrinkwrap and see if it lists it.
From the en.wikipedia.org
Malstaf is the Belgian-born artist whose intriguing idea it was to shrinkwrap human beings.
From the guardian.co.uk
Such discs were identified by a sticker on the CD's shrinkwrap and as part of the CD label artwork.
From the en.wikipedia.org
A boxed copy of Windows 3.0 in the original shrinkwrap.
From the en.wikipedia.org
Initially it preferred to sell only boxed products that could be dispensed by simply tearing the shrinkwrap off a pallet.
From the en.wikipedia.org
This, of course, is the same shift software has undergone from shrinkwrap to service, from Outlook to Gmail, Office to Google Apps, and from the hard drive to the cloud.
From the techcrunch.com
The shrinkwrap license included with the software is therefore invalid as against such a purchaser insofar as it purports to maintain title to the software in the copyright owner.
From the en.wikipedia.org
More examples
Wrap something tightly with heated plastic that shrinks upon cooling; "shrinkwrap the CDs"
Shrink wrap, also shrinkwrap or shrink film, is a material made up of polymer plastic film. When heat is applied to this material it shrinks tightly over whatever it is covering. ...
(Shrinkwrapped (album)) Shrinkwrapped is the sixth, and so far final, studio album by Gang of Four. It was released in 1995 on Castle Records.
(ShrinkWrapped) Read the whole thing; it may be the most illuminating post of the summer.
A method of packaging in plastic film. The material to be wrapped is inserted into a folded roll of polyethylene film, which is heated and sealed around it. The package then passes through a heat tunnel in which film shrinks tightly around the package.
A process to stabilize a pallet load by wrapping stacked products with clear plastic film.
Plastic /cellophane wrap, used for holding cartons to skids or pads to furniture.
Method of tightly wrapping packages or products in plastic film.
Thin film plastic wrap used for multiple purposes on an office move. For example, shrink-wrap is used to secure the contents of pallets, machine carts and book carts.