The prophet reveals this in a recent interview he had..
See the excerpts after the cut:
Some years back, you came out that God instructed you to stop having your bath, is it true. And are you still on it?
Prophet:Yes, it is 13years now to be precise. Early 200 the Lord told me to stop taking my bath, separate myself from my wife and that I should stop taking all those soft drinks and wines. And since then, diligently, I have observed all those things.
Whoever God wants to use for certain purposes on earth, there is a serious price attached to that calling. So I believe that is the price I am paying. As I am talking to you now, I have not taking my bath, if you want me to show you evidence, I will show you if you doubt all I am saying; I have not taking my bath since 2001 till this moment.