How can I use mayonnaise to make my hair less dry?

I blow dried my hair today and now it feels HORRIBLE. I like want to cry. I used to always flip my hair back and it would feel good on my back because it was soft and cozy (hey it`s still cold out!) but now it`s dry and horrible feeling. I`m going to book an appointment tommorow to get my hair trimmed. I really wanna use mayonnaise now. I`ve tried morrocan oil. How do you use it? Thanks!