The previous version not only had the effect of the windshield being perforated by bullets, but also had the possibility of lubricating oil smearing your face after the engine was injured, just like the effect of the windshield being blocked in the movie “Vitaev”.
Previously, enemy planes that were injured and smoking after them would gradually block the windshield with fuel particles that leaked out. Choking makes people uncomfortable.
These was great times when Glock kick in you have full black screen and you can do nothing and when your pilot was wounded screen became red and you can’t pull so mutch… make SB great again Gajin
Imho it was more oil - have in mind that this feature is (or was like u describe it) from my pov incomplete. Why? Because some planes had actually a mechanism implemented which allowed them to clean their windshield during flight. At least late 109s could use fuel (provided by an extra fuel line) to clean their view, so it would be fair to implement this “cleaning” feature too…