ANSWER:

If you did wudu before sleeping and if it breaks in between then no problem, no need to do it again. 

I want to keep wudhu while sleeping but it becomes very difficult to sleep with wudhu because of gas passing problem. How do i tackle this?

Ablution (Wudhu) | April 1, 2020 12:09 pm
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When making wudu do you have to wash the private part if so how do you do it in public?
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My question is about when we do wudu we have to say Bismillah but in washroom it’s not allow to speak right then how can we say Dua before wudu