Lin without more info I can't really help. Please respond to the poster directly as this is a public forum but here are some oven cleaning ideas for you:

FINDING THE BEST OVEN CLEANER: 8 HOMEMADE NATURAL OVEN CLEANERS TESTED & RATED

https://brendid.com/worlds-best-oven-cleaner-8-homemade-natural-oven-cleaners-tested/

This this recipe instead https://www.hometalk.com/38373982/no-chemical-oven-cleaner

I bet lemon would work

Most people use baking soda and vinegar

https://www.hometalk.com/search/all?filter=clean%20oven

A small dish of amonia. warm oven, turn off, put in small dish filled with amonia, let sit overnight.

Here's how I do it:

https://www.hometalk.com/38373982/no-chemical-oven-cleaner

Here is how to clean it with vinegar and baking soda: https://www.youtube.com/watch?v=73OVlUSP_yM

You could try this recipe with double lemon and no orange:

https://tiphero.com/homemade-natural-oven-cleaner

I use the ammonia method. Heat your oven to 200 degrees and shut it off. Take a small bowl of ammonia and put it on a rack in the center of the oven. is the fumes that do the work. Let it set overnight and wipe clean in the morning

I use baking soda or marble paste to clean my oven. If you can be around other citrus fruits, you should be able to substitute with lemons or grapefruit.

This is what I do

https://www.hometalk.com/44252054/getting-down-and-dirty-how-to-clean-an-oven

Hi Lin, this video should help you out, just baking soda and vinegar

https://www.youtube.com/watch?v=M_yxTOaohpY

I saw you can use those dishwasher detergent cubes, dampen them then use it as a scrubber.

I use vinegar, baking soda, and a straight blade.