If you are using any type of Ribshine/Ribrevive/ TFR or anything similar, I would not suggesrt applying to the tubes direct. Spraying on the tubes directly will result in streaking (which can be hard to get rid of). Put it on a sponge and work into the tubes a few feet at a time (rinsing off as you go). these concentrated detergents are good, but need to be used carefully!
You get what you settle for!