I often find it a chore if not impossible to clean the hose I use for racking my beer. I have a beer line cleaner (the brush on a wire) which works ok but it's quite cumbersome and doesn't do a great job. I've been soaking them in sanitizer but that sometimes leaves a milky residue on the hose? (i imagine from eating away at the hose it self. which is even more of a chore to get cleaned. So how do the pros go about cleaning their hoses? run boiling water thru them? dishwasher? all help would be greatly appreciated.
I think the long soak is your problem. Also, cleaning the tubing right after using it, and then letting it dry should help. Oxyclean or Beer line cleaner (a chemical, not a brush) followed by starsan and hang to dry should be all you need.