Question Summary:
Is ghusl compulsory if one is uncertain whether the wetness is mani, mazi or wadi?

Question Detail:

 
I want to know if I made the right decision, it's about determining between Mazi, Mani and Wadi. I think this is the first or second time that something of this nature has happened and I am confused, so please help.
 
1. I don't remember a dream, woke up during Fajr
2. Somewhere around 24 hours ago I did an obligatory ghusl (mentioning as it's unlikely to be twice in a row?)
3. I think I checked or glanced at my undergarment to check if there was anything just in case, and I don't remember seeing anything suspicious at that moment, but I may have missed it
4. Used the bathroom and was pouring water out of a jug onto my private area and it was erect and the water was dripping down from it
5. I think just before or around that time afterwards I noticed wetness on my undergarment, it was just like dampness and I don't recall any whiteness and it wasn't that big of a patch like to explain I think it was like four 50p (UK currency) coins stuck together, about that size
6. Before this I didn't feel or notice anything come out
7. Don't remember stickiness
After thinking about it, I knew the time for Fajr was decreasing and using my own reasoning I determind that it was most probably not a wet dream and so I put on a different set of clothes and prayed.
I also put that undergarment with the dampness on my radiator to dry and I notice there is not a crusty patch, but you can see that there is the outline of where the wetness was.
So my reasoning is that it is very most likely not a wet dream, and it is most probably mazi and I don't think it was the water that I used because I don't think the water would leave an outline on my undergarment, (it wouldn't show an outline when it had dried?) and I don't think it is Wadi because I notice no thick whiteness or any crust on the undergarment which I presume would be there?
So in summary, I made the reasoning that it is mazi and doesn't require wajib ghusl, can you reassure me that my reasoning was correct?

Answer :

In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.
Your conclusion that the wetness was Mazi is correct and ghusl was not required.[1]
And Allah Ta’āla Knows Best
Arshad Ali
Student Darul Iftaa
Trinidad
Checked and Approved by,
Mufti Ebrahim Desai.
http://www.daruliftaa.net/