So, I've been trying to understand the purpose of products like Fast Fret, etc. I've never used a product like that, therefore I have no real world experience with them. But I'm a little confused about the overall premise. It seems counter intuitive to "lube" your strings, doesn't it? By adding some sort of oil/lubricant, wouldn't you be introducing a substance to the string surface that would attract dirt and grime? I'm sure many of you have seen the YouTube video showing the guy smacking his bass strings against the fretboard to get the gunk out from between the windings. This suggests that you don't want anything between the windings that would deaden the sound. So wouldn't a product such as Fast Fret or Ax Wax String Lube fill in the gaps between the windings and therefore cause a deadening effect? Which (for most roundwound players) is not desirable, right? What am I missing here?