just installed some new hieght adjustment skids and after only one week they are completly worn out. I do snow removal for about 9 properties and this past week we had two blizzards plus I do have 10-15lbs extra wieght in the front. 95 craftman 8p 24". Does this mean I will be having to buy new skids every week? I don't get it I just don't understand how they can only last a week.