I have put aluminum screen behind the upper and lower refrigerator vents on the TM. I figured that heated air would be vented especially by the upper vent. Not sure how hot it would be, so that is why I chose the aluminum vs the cloth type screen. I glued it in place with some Goop RV adhesive. There is no way a wasp or mud dauber can get in now to build nests and clog up stuff.
I will try it out this weekend on a camping trip. It should not hinder any air from flowing, but I will monitor it closely while the refrigerator is running.
