I am interested to know any techniques some of you use to clean the inside of hoses and plumbing, either a radiator hose or a hose that's assembled (Aeroquip)? I was looking at a better way, if someone has a technique they can recommend? I would hope that you guys would know what I'm talking about, especially if you assemble your own hoses. I saw a tool called the Hose Hog, but they want $80 for it.

I hate to say that I flush them out with brake clean, but that is what I usually do if it is needed.

brake cleaner and air.