I don't know one parent who's enjoyed potty training. The piles of urine-soaked, cartoon-printed underwear in the laundry room. The mysterious stench behind the potted plant in the hallway. The decision to ruin all of your hard work by strapping your child into a diaper, or risking a pee-pee accident in your $300 car seat while waiting in your older child's after school pick-up line. It's a long list of struggles that take time to overcome. Then, when you finally succeed at having fully dry days, you have to help your toddler potty train while sleeping, which is a whole new type of obsticle.
Overnight and nap time potty training can be even more difficult than day training, because there really is no way to insist that a sleeping toddler wake himself up to use the toilet. It can be slightly easier for a child to stay dry through a midday nap, especially if it's on the shorter side. But, when you have a deep sleeper, it can take them months or even years to learn how to stay dry throughout the night.
Thankfully, there are some ways that parents can help their toddlers avoid (or at least limit) wetting the bed while they sleep.