THCA does not magically crystallize IN the fuge.
you’re merely performing filtration.
what makes you think there were solids in there to start with? (did @moronnabis tell you that?)
you gotta start with sugar sugar…. 
I prewarm my fuge to 40C before playing this trick. then tuned the speed to keep it between 35-40C. this makes the liquid less viscous, leaving cleaner solids.