What size needles have you been using lately? Maybe try some really thick chunky yarn and size 13 or larger needles? If I couldn't knit comfortably with sock yarn and toothpick sized needles or even regular worsted #4 yarn and 8 or 9 needles, I'd do fatter yarn and needles. Whatever it takes.
This is the last time I'm frogging this project for the last time.