Salatul Layl

Salat al-layl refers to additional prayers performed by Muslims at late night.

Is it permissible to shower late at night, such as before Fajr or Tahajjud prayers? I have heard that bathing at this time can be dangerous due to potential Jinn possession. Is there any truth to this belief? Sayyed Mohammad Al-Musawi	During Salatul Witr, is it permissible to include Imam Mahdi (af) in the list of 40 believers I mention during Qunut? Sayyed Mohammad Al-Musawi
Would it be more beneficial to prioritize completing my missed Qadha prayers over performing Salat al-Layl, considering that I currently make up for them by praying one Qadha Fajr Salah and another Qadha Salah daily? Sayyed Mohammad Al-Musawi	Is it permissible to change the number of Rakats I initially intended for night prayer after starting the Salah? Sayyed Mohammad Al-Musawi