I second BBelfield about focusing on keeping these areas clean. I’ve seen the experts go both ways on whether to lube or not lube the stanchions, but everyone will agree the most important part is keeping them clean. For what its worth, I don’t use any product and I’ve never had issues. If you do choose a lube product, keep it minimal or it will just start gunking up the external surfaces, and who knows whats going on internal.