The last few weeks, E (3.5) has been waking up in the night in a soaking wet bed. Her night time pull up is leaking.

She has been potty trained for a year but we still have regular daytime accidents at home. I'm pretty sure she is peeing in her sleep, so unable to "night train". We have talked about getting up to pee and she understands, but she is waking up wet (not waking up then peeing). She's a big drinker; I've tried giving her a last drink an hr before bed and taking her to the toilet before bed (6pm) but it hasn't helped. Her pull up leads because it is full.

She's in the biggest pull ups they do. The other option is older child bed wetting pants but they are so expensive.

Any ideas? I'm tired of washing piss soaked bed linen every day. It soaks her pillow, her duvet, everything. Plus I'm tired. The baby is already up half the night teething, I could do without changing bed sheets in the night as well.