Cinnamon Grammy go to hikelightdotcom and then go to the videos link – chapter 33 has a demo of how to make a pot cozy. After I watched the video I realized I had already made something like that years ago using leftover prelined quilted fabric from a robe. My lid just connected part way and then I had a ribbon on the lid part and the pot part to tie it closed. I didn’t “cook” with it but it helped keep a pot of food warm for several hours. Mine was sewn but his tape tip would probably work.
Slow cookers sometimes come with a BIG rubber band to hold the lid down as it goes over the handle on the lid and connects to handles on the pot – that might help. Also I will often put a piece of parchment paper between the lid and the pot to help with dribbles and then secure the lid.
Some pots have really tight fitting lids but they would not be worth the money if you already have a good pot.