I made the Reflectix inserts yesterday and installed in ALL windows and left them in overnight. Whoa, opened PUP this morning and felt like an oven. I checked the forum and saw that most people said to put the inserts in the end bunks. The temps will be 105 while camping - ughhh! Thankfully we have AC and hope to have PUP underneath shade. Are the inserts ONLY supposed to be used on the sun side of the PUP? Or are they only used in all windows of the end bunks? The reason I ask is when I took out the insert out of the largest window by the dinette (the sun side this morning) I could really feel the sun coming in. As soon as I put it back in it seemed cooler. Do you leave the inserts in the whole time camping? I am sorry for all the questions. Running around crazily getting last minute things done AND trying to think of things that will make life more comfortable in this crazy heat. Unfortunately, I didn't have time or money to buy Popup Gizmos for this trip.