I am using a brand new mat but I will give that a try.

Mine are working just fine and for a $1.00 if not quite perfect that is OK

I have used mine for several projects and not had a problem...when it did skip a couple times, it was me not starting all the way at the end.

Sorry to hear you have some bad ones.

I love them. At a buck a blade I can't complain. One blade was a bummer but in the trash it went. One lasted long enough for me to cut 5 layers of fabric for 8 yes 8 I spy quilts.

I have had brand name blades poop out after 20 cuts. No guarantee comes with HF, No guarantee comes with brand name blades except a call to customer service and then there is no guarantee, you would get a replacement.
So the message is just buyer beware for everything.

When people have posted with a similar experience with them, I have seen suggestions to double check that you do have only 1 blade, as they have a tendancy to stick together. Worth double checking before going thru the hassle & disappointment of returning them.

Funny that you bring this up because today for the first time ever I used one and I did not like it! It "skipped" some of the material and didn't cut a nice clean cut like my other blades did. I will try another one, maybe I got a dud, I don't know...

I love them and have never had any trouble with them. Sorry you're having a hard time.

Definitely try changing the mat side, assuring there is only one blade and if all else fails, try to exchange. Once you discover the good ones for $1 it's hard to go back to paying so much.

I don't care for them either. I pay for joanns 1/2 price, they last longer. 5 pack has lasted me over a year, but I don't cut paper.

I had trouble with my first one it kept skipping threads every so ofter. It turned out there was a little goo (technical term) on the blade from the packaging. I took the blade off, used a little alchol, cleaned the blade, put it back on and had no problem after that. Cut like a dream. Hope this fixes your problem.