I was going to tack this on to the "hookup rates" thread below, but it probably deserves it own.
As the title asks, how often do you replace your hooks? Or more to the point (sorry) how do you decide that your hooks are too blunt, and need replacing?
I tend to use the fingernail test. That is to drag the point across a fingernail. If it leaves a scratch or digs in, then its probably ok, otherwise it gets binned.
Of course if you weren't paying nearly $1 each for them maybe you would just bin them after so many uses regardless.
Some days you seem to get lots of bites that just dont stick, planting a seed of doubt in your mind as to whether your hooks are not sharp enough.
How do you decide when its time to replace?