How do you clean?

Hey guys, just curious how you all are cleaning your hoses and water resovoirs, I was hoping to run bleach thru the system but then realized it's not going to get out of my hose that way. Ideas? I'd prefer not to buy a new hose every couple weeks when I want to clean. I use mollasses so I could rinse 20 times with warm water and the take a paper towel to the bottom and it's still a tad bit brown. Not much, but enough to make me nervous for nutrient lockouts and bacterial buildup. Thanks for input guys.

Start beneficial bacteria colonies and clean your hoses once a year. I know people who never clean their reservoirs and they're still popping out badass plants. Maybe it's just dumb luck.