In order to apply the mayonnaise hair mask to your hair, you have to spread the mayonnaise uniformly through your hair, in either wet or dry condition. The use of a comb is not recommended and you can simply use your fingertips as combs to spread the mayonnaise. However, once you have spread the mayonnaise, then you can use a wide-toothed comb and brush your hair thoroughly from the scalp to the ends.
Once you have ensured that the mayonnaise hair mask has been evenly applied throughout the length of the hair, you will have to wrap the hair with the hot and damp towel for 10 minutes approximately. The towel wrapping will essentially heat up the mayonnaise hair mask and will make it easier for the hair and scalp to absorb the hair mask. After 10 minutes is over, unwrap the towel and use shower and shampoo to cleanse the hair of mayonnaise.