I did my truck several years ago. I did both the back and front seals, and between the front and back doors. At the time the hose of choice was plain 3/8 OD clear plastic. It works fine for me, but I could see trouble in colder climes. Probably the easiest way is to take off the weather stripping and lay it out straight. A fish would work best, but talc or WD40 also will work. There are some plugs near the bottom of the weather stripping that have to be removed as well. I believe the end result is worth the effort.