Nighttime dryness is a hard thing to achieve. If she has accidents most nights, she is probably not physically ready and a Pull-Up is your best option until she is a little older. I think the average age for nighttime dryness is 4, so if she is still having accidents at night, it is normal.
But I have been given a few tips from friends that you can try out whenever she seems ready to go all night without a diaper/Pull-up. I'll pass them all along because every kid is different and you never know what will work.
1. Try "double sheeting" her bed. Put a waterproof sheet between two fitted sheets and then you just remove the top two sheets if she has an accident. Easy clean up and everyone gets back to sleep fast.
2. Put a potty in her room that she can use during the night if she wakes up needing to pee.
3. Try training pants at night (I really like Fuzzibunz Trickle-Free Trainers) instead of Pull-ups. They will allow her to feel some wetness without making a huge mess of her bed. The wetness should wake her up. Then you can take her to the potty to "finish the job", change the training pants and get back to sleep. Hopefully this will train her to wake up before she feels wet.
4. Put nightlights in the hall and bathroom so that she can get up and go on her own in the middle of the night, but only if you think she can get there and back on her own without trouble.
As for trying to curb daytime accidents, don't get angry (even though this can be HARD because it is so frustrating, especially after a good day). Just calmly remind her that she needs to listen to her body and go pee when she needs to. Then make her help you clean up so that she has to take some responsibility for her mess. Also try to teach her good habits like trying to go to the bathroom before you leave the house, etc.
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