I use mine a long time, longer than I should, I also bought a sharpener, but they don't stay sharp long.

We are supposed to change them?!?! :shock: I probably should change them a lot more than I do, but I can't remember the last time I changed it actually... oops!

I change when I make a cut and have skipped spots. I don't re cut several times, that's a waste of my time. A sharp blade will cut the first pass. I keep several roatry cutters with new blades in them available to grab. The cutters that need a new blade go in a container until I have time to re blade them. When I find a rotary cutter on clearance I buy it. I have found that the Gingher rotary cutter with Gingher blade last almost forever. I haven't changed that blade since I've bought it.

I don't think I have changed a blade since I started quilting, lol I sharpen before I start a new quilt but I always keep the same blade. IF it seems to miss spots for me that normally means the blade has a nic in it so I just grind it out flip it over sharpen and I am off again!

What type of mat are you using. I had a friend that was using a june tailor. It was really hard. I suggested she get an olfa self healing and it has made a world of difference. But could just be it is time to change the blade.

After replacing several dull blades, I finally figured out that my mat was the problem! It was a very old Olfa mat that was probably a little warped.

Donna Mae........Have your tried Ebay for your blades? I purchased a bunch from there.

I also purchased Ergo blades, and they appear to last quite a bit longer.