What is the definitive difference between madhy (pre-ejaculatory fluid) and maniy (semen) to determine when ghusl (ritual bath) is required? And is ghusl required upon waking to find water mixed with a white substance after experiencing a wet dream with desire only? And must the fasting and prayers of past years, during which masturbation was practiced by day or night, be redone, given the doubt about its invalidation of the fast?

A woman's maniy (seminal fluid) differs from madhiy (pre-seminal fluid) in color, odor, the accompanying arousal, and the subsequent fatigue. If you are uncertain whether it is maniy or madhiy, you have the option to consider it either. The discharge resulting from a wet dream is considered maniy and necessitates ghusl (ritual bath). As for masturbating during the daytime in Ramadan out of ignorance, there is a difference of opinion; the more cautious approach is to make up the days on which masturbation occurred. There is no compensatory fasting required if the masturbation occurred at night, but according to the majority of scholars, it is obligatory to make up the prayers performed after masturbation without ghusl, and this is the more cautious view.