Hey, I just started using GHS Brite Flats on my Epi Allen Woody Rumblekat for a Roots Rock gig I've been doing and I am absolutely loving the tone as is the rest of the band but man, my fingers are starting to hurt. I've got pretty good callouses from Roundwounds but after the 3rd set last night my index and pinky fingers were a little sore. I do a lot of slides especially up to octave notes and I was wonder what some of you use to lubricate your strings with??? I use Finger Ease normally on my Roundwound strings and it usually does the trick but it doesn't seem to work out well on the flats. I've heard everything from Vasoline to Hemp oil, what's your take?