Conditioner - *COLD WATER* and hold the hair up while you wash it. Don't let the weight of the water pull it down (it will pull some of the curls/crimps outs).
My method...I wash the hair gently in cold water, then layer tons of conditioner on it and comb it through (maybe a large tooth comb in this case), then I let the conditioner dry completely - usually overnight. I wash it out the next day, again, cold water.