Yesterday I noticed that my rotary blade was feeling dull. Well it was not
really the blade which I had just cleaned (with WD40) but it was the fabric
which had been washed but not yet starched. As I was cutting the overlock
seams the fabric was getting stuck in the mat. Finally I gave up and used
my scissors. Now I know why my mat usually stays pretty clean when I cut
starched fabric but this sure made quite a mess.

Just thought I'd share my little experience. :-D

Happy quilting.

I noticed that too.

I too just learned the value of using starch. Last weekend I purchaed a quart of concentrated starch and new spray bottle. Now I know I will not run out for a while. Thanks for the tip on starching before you cut, I will try this out.
NormaBeth

If your mat has that many dings and grooves, it sounds like it's time for a new mat.

WD40 can gum up clipper blades so I imagine it would do the same for rotary blades.

I don't think there's anything wrong with my mat but I will clean it good
and see.

I removed the blade before wiping with WD40. My rotary cutter is fine. :-D

glad you got your rotary cutter fixed

Interesting!

Thanks for the tip.