I've also found that heavier line makes a difference. If you must use mono, 17 is the best I've found. You don't want a ton of stretch, you'll have issues driving the hook in with lighter lines. I use braid during the summer, then go back to fluorocarbon or Silver Thread once the grass starts to die, usually this time of year. I superglue my knots to the hook, just to keep it at the right angle, too.