i had a teacher who was kind of kooky when it came to final rinse ( color or b/w )
he would put his 2 or 3 drops of the wetting agent in his tank and pull /put the film
through it then whack the tank to DE-bubble ( like pre-wet ) then ...
slowly pour water on the top of the tank and let the foam wash out of the tank ...
then hang without wiping ... he then would say " this film will never be touched by human hands again"
one problem people have with their end-run is they put too much in the tank and it leaves a residue
... a tiny amount works wonders.

good luck getting your film free+ clear!
john