If he does ghusl following a wet dream, maniy continues to come out of him during the prayer
Question

                May Allah reward you with good for answering my question, but I think that it needs further explanation of the issue of sprinkling hot water on the private part, because the wet dream occurred at the time of ‘Asr prayer, and I have a problem, which is that maniy and even madhiy continue to come out for a considerable period after they are first emitted. It often happens with me that one of them is emitted at the time of prayer, whether that is because of thinking or because of a wet dream, but in order not to miss the prayer, I sprinkle hot water (on my private part) so that whatever is left will come out. Please note that I do not feel any desire when I use this method. Now I am going to make up the fast of that day that I told you about, in sha Allah, but what should I do if maniy continues to come out whilst I am praying? Should I pray in that case?
Praise be to Allah.
      Firstly: 

    We appreciate this 
    further explanation and we ask Allah, may He be exalted, to help us and you 
    avoid reprehensible words and actions. 

    Secondly: 

    If it does not 
    come out continually all the time, then it does not come under the ruling on 
    incontinence; rather it invalidates wudoo’ as soon as it comes out, even if 
    that happens during the prayer. The one who is faced with that should stop 
    praying, do wudoo’ and then repeat the prayer. He also has to do wash off 
    whatever has gotten onto him if what came out was urine or madhiy, because 
    they are both najis (impure), unlike maniy which is taahir (pure). 

    But the one who is 
    praying should not interrupt his prayer unless he is certain that something 
    has come out of him, because the basic principle is that he remains in a 
    state of purity, and that which is certain cannot be changed by mere doubt 
    or uncertainty. 

    If maniy came out 
    of a person and he did ghusl for that, then more came out but without 
    desire, then he does not have to do ghusl again, but it does invalidate his 
    wudoo’. 

    See: ash-Sharh 
    al-Mumti‘, 1/337 

    The scholars of 
    the Standing Committee for Issuing Fatwas were asked: If I do wudoo’ for 
    every prayer and then go out to the mosque, I always emit madhiy; can I 
    pray, knowing that if I take a bath and go out, madhiy will come out without 
    desire. So do I have to take a bath every time? 

    They replied: 

    If that comes out 
    of you continually, then it comes under the same ruling as incontinence, and 
    you have to do wudoo’ for every prayer when the time for it begins, then 
    your prayer will be valid even if it comes out whilst you are praying. If it 
    does not happen frequently with you, then you have to do wudoo’ as 
    prescribed for prayer, after washing the penis and testicles. But you do not 
    have to do ghusl (take a bath) for that. End quote. 

    Fataawa 
    al-Lajnah ad-Daa’imah, 
    5/413 

    Shaykh Ibn 
    ‘Uthaymeen (may Allah have mercy on him) was asked: When I finish wudoo’ and 
    go to pray, I feel that a drop of urine comes out of the penis; what should 
    I do? 

    He replied: What 
    you should do is pay no attention to that and ignore it, as the Muslim 
    scholars have enjoined. Do not pay any attention to it and do not go and 
    look at your penis to see if anything came out or not. If you seek refuge 
    with Allah from the accursed Shaytaan and ignore it, it will go away, by 
    Allah’s leave. But if you are absolutely certain about it, then it is 
    essential to wash whatever the urine has gotten onto and repeat your wudoo’. 
    Some people, if they feel any coolness on the head of the penis, think that 
    something has come out. So if you are certain, then do what I have told you. 
    What you have mentioned is not incontinence, because it stops and starts, 
    whereas incontinence is ongoing and continual. But this happens after 
    movement and one or two drops come out; this is not incontinence, because 
    once a couple of drops have come out, it stops. In this case, he should wash 
    it off and do wudoo’ again. He should always do this, and he should be 
    patient and seek reward with Allah. 

    End quote from 
    Liqa’ al-Baab al-Maftooh, 15/184 

    And Allah knows 
    best.