how much and how long do you keep using your blue max? the best tip is to always check the edge of the blade to make sure it’s still sharp. there was a place that would take the blades and sharpen the edge again. i can’t remember off hand who does them. i only use the blue max on back windshield only. sometimes what i’ll do is before i use my blue max i’ll spray it down on both sides or i’ll run my fingers down the blade to remove any dirt on the blade.
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