The grease is a build up overtime. We want to paint but grease needs to be removed first.
Hi Mary, You may want to try dawn and hot water. Here are some other suggestions. Good luck with your cleaning project. How To Clean Greasy Kitchen Walls, Backsplashes, and ... - The Kitchn
Apr 7, 2016 - Over time, grease splatters build up and leave a residue over all your kitchensurfaces, but relax — we have a solution that makes cleanup as easy as wipe, wash, rinse, and done! ... How often you’ll need to give your walls, backsplashes, and cupboards a deeper, more thorough ...
Grease can be removed with many things like TSP or a TSP substitute. First I would give it a good soapy scrub with Dawn dish detergent and a magic eraser. Rinse with a microfiber cloth. This can be used in every you asked about.
I always just use vinegar and hot water. Add more vinegar to the water for really bad grease.
Hands down TSP. If this has built up over time from lack of proper cleaning, TSP will cut through all the gunk so you can repaint.