Here's what I do, Dawn:
Hi Dawn, perhaps this will help: https://www.thekitchn.com/how-to-clean-an-oven-cleaning-lessons-from-the-kitchn-201191
Many ovens are self cleaning now, so be sure yours is not before you try to clean it. When I did not have a self cleaning oven, I used aroma free Oven Cleaner (store brand). I heated the oven to warm (lowest setting) then shut it off and sprayed it. Or you can spray a cold oven and let it set all night. That is the easiest way. If you are uncomfortable using chemicals, here is one of many in our tutorials. If you need to find another, go to "explore projects" then "clean" then type "oven" into the box that says "find your project" in the top left of the "clean" page. You will find a whole host of ideas. Here is one I chose for you: https://www.hometalk.com/1884826/oven-cleaning-made-easy-green-cleaning-tips
Hi Dawn: What I use is a paste of vinegar and cream of tartar (the dry stuff). Make a paste and put it on the gunk. Let it sit for about 15 or 20 seconds and then scrape off with a plastic putty knife or one of those plastic scrubbies. You may have to do it a couple of times if the gunk is thick, but usually not. There is no smell and it is environmentally safe. A lot of people don't know, but on most stoves, the door comes off and the bottom of the oven comes off. You don't have to take the door off to get the oven floor out. Sometimes it's hard to get the door back on:) Good luck.