Can the fan jets be adjusted? Ive bought new ones, and its pattern is still pretty crap.

Pattern, or direction?

I assumed by their name, they generate a mist across the angle of their spray - mine do. Direction - not sure. I think I recall someone in the past saying they could be adjusted, but I had thought they were non-adjustable (but I have never tried). If you have fitted some new one, maybe a close look at the old ones you removed might help.