On this evening, I decided to bypass the store and see if there wasn't a way to make this easily myself. And what I found impressed me: a two-ingredient option that was worth the attempt even if it didn't work.
Homemade upholstery cleaner
2 cups warm water
squirt dish soap
In a mixer, blend on medium or higher until foamy.
Sounded easy enough, but did it work? I put my dirty, puke-stained floor coverings to the test.
I may never buy Resolve again.