Yes, I understand that I'm not mounting them 180° in the wrong direction. If they are mounted so that when you pull the string toward you to retieve your ball the string runs through the teeth in time it wears the teeth out. Eventually the teeth no longer grab the string when you release your hand and want them device to hold the tension (and support the rigger weight close to the boat). It's plastic so repetitive use kills them. If you play with the angle at which you mount them on your swivel or base relative to where you generally stand when pulling the string then the string will track along the top and not wear out the teeth. It was taking me 40 or so days to burn through a set but that meant replacing them a couple times the first year. Haven't replaced a set since.
I don't Use them every day but there's a time and a place. Fishing deep in the tides, ****** weather, back ***** the bed and decide it doesn't want to reach nor lift the ball for a couple days, or it'sa salad festival.
Just one more tool in the box .... hope that makes sense.