Streaking is usually caused by left-over water in the tank (or running through the darkroom naked - but thats another story..).

I normally work with two JOBO tanks in color print processing. After unloading the first, I'll wipe the inside of the tank with a large wad of run-of-the mill paper towels - and let it air dry until my next print is ready - about five to ten minutes. - a method devised from practical experience.

It is a good idea to use shortstop between color developer and bleach-fix - I do - invariably.