Welcome
With time i realised there are two types of sobriety. Negative and positive.
Negative means as you say Sur merah - push away anything negative, anything lustful, any fantasies - push them away, but by me they came back even harder after that and it usually ended in a fall. Whereas positive sobriety means by me, instead of actively pushing it away i started thinking of other thing or started reading books from the Shmuz, that way starting to think of other things and through that the fantasy or the feeling did not come back stronger
Hazlacha