Although I would have never "thunk" it possible, I read somewhere to flip the blade over....heck! I remember now! People were talking about the Harbor Freight blades and if you get one that skips, etc. try turning it over. Soooo, I decided to try it on my 60mm Olfa and it worked! I am sure it is only temporary, but at least it's cutting with ease at the moment...if it doesn't work, you aren't out anything by just trying it :)
P.S. I tried 3 Harbor Freight blades (new and flipped) and they all were horrid for me- I pitched them!