It's like getting out all the built up residue, maybe from them not getting clean enough, too much detergent it not all rinsing out.
I just did a type of stripping i guess last night, I put all the diapers in my washer, got them all wet, then poured in TONS of white vinegar and a huge scoop of oxiclean, it foamed up and I let it sit all night, then rinsed it all out and washed and dried them. They smell really nice. But the real test will be his nighttime diaper tonight, how it smells in the morning lol. But apparently this is the best way to get out stinkies
My normal washing routine is every 2-3 days I do a cold rinse, hot wash with detergent, cold rinse and an extra cold rinse. Then I dry it all on low heat