[Haggis]

With one person in the RV and one person looking under the kitchen slide, shine a flashlight under extented the kitchen slide. If you can see the light of the flashlight coming through, that should show you one of the reasons you are using a lot of propane.

Shine the light from the inside then from the outside.

The kitchen slide is the biggest problem with air leaks in a lot of Doubletree units.