I can usually get at least 6 - 10 quilts out of a blade. I use the Martelli Blades in my martelli cutter on a Martelli mat.
I think either you do not have a very good mat and it's dulling your blades or there is something wrong with the blades or cutter.
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My newest Grandson, Caleb Austin, was born May 29th. I am now Grandma to 4 precious babies. I am so blessed!!!!