You could route the case vent to the intake of your engine... that way the oil would go out the exhaust...
Certainly doesn’t cost much to experiment with the idea. One of my friends did and he eventually removed the line to the intake. The conclusion was that a droplet of oil was occasionally released at times that would put out the fire. A big drop of oil during landing and after extended low speed operation might not help the glow plug stay lit. Try the idea. Maybe your results will be better.
Bill S