Is it just the braun hefe
that has the propensity for sticking /clinging to whatever it contacts? If so, and yeast loss is a concern, why not an appropriately long, sanitized length of tubing, big enough in diameter to be "bunged" into the carboy neck, stretched vertically with some sort of airlock at the end making a braun hefe
collecting chimney of sorts? The braun
stuff sticks, and the desirable yeast fall back into the fermenter.
I did this a number of years ago . . Kind of a cheesy Burton Union when I was gonna have an explosion. I drilled some holes in the bucket's bottom, sanitized them, pushed the stoppers and airlocks in, and pinned them to the carboy. Worked pretty well for a panic fix!