Have you tried creatine loading? Take 20 to 25g per day for a week, then take 5g/day for a month. Take a few weeks off and do it again. That's what I've done in the past when I was taking creatine for a recovery enhancer.
There was a research that concluded that after a month, there is no difference in creatine amount in blood if you've been loading or just taking 5g daily.
I've only ever heard of creatine loading as a way of getting an early kickstart for workouts. I didn't think it was even supposed to help in the 1+ month window, just get you better training results for a week or two up front.