I have found when my blades chatter that they are old an getting hard, then
I replace them. This is providing your blade holders have not been twisted.
Silicon spray would make a hell of a mess I would think.
Depends. I have a fancy set of teflon insert blades I use during rainy
season. In spring when the chance of rain is less, I change to a set
of regular blades and let them bake in the sun all summer. Once rainy
season starts again I change back. Since the winter blades see very
little sun I expect they should last quite a while.
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