The easiest and most efficient way to wash off the wax from hair is to use a combination of warm water, conditioner, and shampoo. First, wash the hair thoroughly with warm water. Make sure that all your hair is wet. Then, apply the conditioner. Use your fingers and massage them so that the conditioner will remove the wax. Finally, rinse everything off with shampoo. Brush your fingers through the hair to check if there is any greasiness left in the hair. You can repeat these steps one more time to remove the wax completely.