UPDATE: Mayonnaise as a dry hair treatment.

First thing's first, I have long thick layered hair that has been dyed quite a few times. I use to have blonde low lights so some sections are literally fried.

Process: So I researched this home remedy and basically just grabbed mayonnaise straight from the jar and slathered it throughout my hair and left it in for an hour. Eventually I wrapped it up because the oil was dripping from the mayo. I washed it really well with Dove's intense repair shampoo & conditioner. The conditioner however I rinsed out with cold water. I briefly towel dried it and then let it dry on its own.

Results: My hair does feel softer and shinier. The results weren't too dramatic but I will definetely try this again. It seems like one of those things that with continued use will pay off.

TL;DR:Worth trying, results arn't dramatic but definitely trying again.