I would also wait a day. And as mentioned, never just Willy Nilly cut your water in half. First, lye needs at least its own weight to fully dissolve - and you don’t want to end up with lye heavy soap. So use a lye solution (not water as a % of oils) but a lye solution of 33-35%. Also, rebatching is not that difficult, I’ve rebatched dozens of times. Cut or grate your soap up very fine, I like to use a salad shooter. You can use a crockpot, but I use my stovetop and a stainless steel pot. Add your grated/shredded soap to the pot & turn on very low heat. You want to melt the soap down as evenly as possible & be careful not to scorch/burn the soap. With fresh soap, I would add 1-2 teaspoons liquid per pound of soap, with older soap, it’s 1-2 tablespoons. Sometimes I use Aloe Juice or Coconut Milk instead of water. When the soap is nearly melted, I add a tablespoon of yogurt to help it be more fluid. This soap will never be pourable though. When it’s all melted (it will take at least an hour), you may want to add some additional color/fragrance as frequently the fragrance is gone and the color is a jumble of many colors. It’s not as hard as everyone thinks.