Originally Posted by jumpin' judy
I have the 24 x 36 Olfa that is probably 5-6 yrs old and now has grooves from all the cutting. Is this the kind of damage you are talking about? I did go ahead and buy a Dritz (blue one that says "Duraheal" in the corner). It is made in Japan. So far (keep your fingers crossed) it hasn't developed grooves.
If you change your rotary blades more frequently you should not have as many problems with grooves. Normally, as the blade begins to dull, we push down a bit harder. Often times it is something we don't even realize we are doing and changing the blade more often will keep us from doing this. :thumbup: