I'm surprised that ZipCast hasn't been mentioned as I thought I first heard about it here. I've used it for several years and really like it. The best part is that it cleans and dresses all in one step without drying or buffing. The ease of application means that I do it often. In fact, I strip off the first 20-30' of line before each outing and run it through a piece of cloth with a couple drops of ZipCast.

I still have some Glide and during the off season I will wash my line in soapy water and then treat it with Glide per instructions (including drying and buffing). But I really like the ease of applying ZipCast and the immediate results.