Are there home remedies and a healthy routine for curing nocturnal emmisions (wet dreams)?

No. If you are a normal, sexually-mature male and do not masturbate or have a partner, you will have wet dreams. One of the cults teaches that these are unhealthy. This is a lie intended to frighten teenagers. I personally know one pastor who left the cult rather than teach this. Being a man is difficult enough without having this frightening and false put into your head.
No. This is a normal occurrence, there is nothing to treat and nothing to be concerned about or embarrassed about.