Baffled, Part 1

We've been baffled as to why our Dometic RM2510 doesn't cool on the road, but cools great while sitting still. The flame is not blowing out. But one possibility is that the space behind the refrigerator is too big and needs a baffle to direct the air flow to the absorber coil. We got this idea from a Dometic installation manual on page 3 at http://bryantrv.com//docs2/docs/dometicventing.pdf.

Looking down through the top vent opening behind the refrigerator.
This is a top view of the absorber coil. The flue pipe is on the right.

Here's the THERMOPAN sheet, 19.5 x 47.5 inches,
 we bought at Menard's to make the new baffle.
THERMOPAN is a type of heat-resistant, foil-covered cardboard,
easy to cut, and easy to fold for this purpose.

We cut and bent the THERMOPAN to create a baffle in this configuration.
The new baffle is meant to direct air closer to the absorber coil.

Great Husband inserts the new baffle down through the top vent opening
until it sits on the top lip of the lower vent opening below.
There the vent trim screws hold it in place.
The upper edge of the baffle is also held in place by the vent cover screws.