What should I do regarding the conflict between the fatwas of Ibn Uthaymeen and Ibn Baz concerning the make-up of intentionally missed prayers? And must I repent anew and perform ghusl? And what is the ruling on my prayers and worship since my repentance? And do the prayers I performed without wudu have the same ruling as making them up?

What was previously ruled, that whoever abandons prayer out of laziness does not disbelieve, and that making up the prayers is obligatory, is the opinion of the majority of scholars. And according to the view that abandoning prayer is major disbelief, repentance is valid, and a disbeliever is not required to perform ghusl (ritual bath) for their Islam to be valid; rather, it is recommended. The prayers that were performed without ablution must be made up, and you will be rewarded for making them up.