Here are three solutions to fix watery, underdone or gummy rice:
1. If your rice is cooked through but watery: drain in a colander, spread on a sheet pan and put in a 350 degree F oven for 5 minutes to dry.
2. If your rice is underdone and dry: add 1/2 cup hot water to the pan, replace the lid and wait five minutes. If the pan is still hot, the steam produced should finish the rice.
3. If your rice is gooey or gummy: consider turning it into rice pudding or horchata. You can always feed it to your dog; they love the stuff.