With this being a common occurrence for many, why do you think that manufacturers haven't taken this to heart and simply installed a roof vent in the kitchen area to help with the venting process? I have seen this in a few higher priced RV's but not many. I suspect those that are considered full time RV's would be the ones that might have this "feature".
Seems to me that the excess moisture and heat generated in the kitchen area of any RV would be as much of a concern as say moisture issues in the bathroom?
I have contemplated having this done to ours but I guess it just hasn't become a big enough of a pain/concern to justify the work/cost of doing so.
2015 GMC Sierra 2500HD SLT 6.0L SRW
2017 Jayco Eagle 330RSTS (on the way)