I seem to go through a tonne of cranks, about one a year, which seems a bit high.. I've destroyed the old square ones, a few newer Shimano ones with the shallow teeth..

Most recently I switched to a FSA crankset, because my Shimano one gave up on the middle of a tour through France. The locking design looked great but several hundred miles later I've got a creak, and yup there was some moisture inside (where the crank joins the bottom bracket). The aluminium on the crank has eroded slightly, so three of the teeth have been polished with about a third of a millimetre taken off them. Looks like this old habit of ruining cranks is not going away. The bottom bracket fyi is still absolutely fine.

So the question, now that my crank is a bit scuffed what can I do to keep it going as long as possible? I was thinking I'd put some loctite on the polished sections, to make sure no moisture got in those tiny gaps. Anyone foresee that being a terrible idea? I guess I just have to be a lot more judicious about checking the crank fitting for moisture in the future, but does anyone have any tips for keeping it dry and in good shape? If I'm honest I think some of the moisture in there might be degreaser, an error on my part, does anyone put thick grease in there, or do you try to keep it bone dry?

Thanks in advance, honestly if I can keep a crank alive for a year at once I will be over the moon.