I love it cold and hot, but when I want it hot, I add a little bit more milk on top, then heat it in the microwave or on stove top. (jessicainthekitchen.com)
Once you think it's done cooking, add a little bit more milk and then keep on stirring! (fitfoodiefinds.com)
If the mixture feels very dry, add a tiny bit more milk. (traineatgain.com)