I was listing to Clark Howard on the radio today. One of his money saving tips was to dry your razorblade after shaving. He was told by an engineer who told him that it is not shaving that dulls the blad but water setting on it. Clark gave it a try and noticed that in-fact they did last longer. His last razor lasted him a one year.
I know this sounds super cheep but I bought some last week, I use one that comes with three blades on it. I remember thinking "oh my gosh" when I saw the price.
I think I will give it a try. After all it cost nothing to see if it works or not.