I was working on adding 12v fans to my highwall pup's refrigerator to help with air-flow because the gas-absorption refrigerator really struggles to stay cool on hot days. After installing the fans, I noticed that even so, air wasn't coming out nearly as well as I expected (especially based on the first PUP I have done this to). After examining the vent covers, the screening that the manufacturer used really constricts airflow. It is similar to screening used for windows. It keeps the wasps and dirt daubbers out, but it is just too restrictive, IMO. I noticed some disposable "grill toppers" in the grill accessories section in Walmart yesterday. They are made of expanded aluminum and come three to a pack. Being aluminum, they will not rust and are quite durable. This seemed to be perfect for making new grates for the refrigerator vent covers. Pictures below. The original screening. The screening removed. The disposable grill toppers from the store. Cut to fit. These were very easy to cut with wire cutters. I had to use galvanized wire to attach one section to the next in order to be wide enough for the vent cover. Doing the dry fitting. Gluing and clamping. I used Shoe Goo because that's what I had on hand. I've tried hot glue previously and but that doesn't last on smooth plastic surfaces. While I was working on the vent covers, I wanted to do something about the discoloration of the exterior plastic. I didn't want to paint them like I did a couple of the other exterior plastic pieces. These have been exposed to the outside most of the last six years, so I started with a Mr. Clean Magic Eraser, which I thought would remove maybe some of the oxidation and surface blemishes. It's one of my favorite things to use. That worked a bit. Lots of elbow grease. I figured I would use my favorite cleaning product, L.A.'s Totally Awesome, and see what that would do. As soon as I sprayed it on, the grime just spilled off. I used a sponge and went over everything but it almost wasn't necessary. Below is a side-by-side comparison. The one on the left was after using Awesome, the right is untouched. You can see the grill topper through the vent slits in the picture above. This is only visible if you bend over and look up through the vent when they are installed. I supposed I could have painted them white before installing them, but that's just a bit too much, for even me. I spent less than $4 on this mod and the toppers should work for anything else that needs a screen to keep wasps out of it.