What is the best product to use for cleaning greasy kitchen cabinets?

I use plain ammonia mixed with water. Wipe on with a damp sponge, scrub a bit if needed and then wipe off. Wipe with a clean, wet cloth to remove residue

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Baking soda and Dawn dish soap with a bit of water to make a paste. Apply and let sit at least 10 minutes. Scrub with brush and wipe with damp cloth.

Age has nothing to do with it. Murphy's Oil Soap. Works the best!

Dawn dishwashing liquid and water.

Murphy's oil soap, follow the directions on the bottle.

rub a little olive oil or baby oil on hard to remove grease first then wash down with warm soapy water.

Dawn original dish soap. Cuts through grease easily, just like with the dishes. Cost effective too.