I am trying unsucessfully to cut Centura Pearl Card with my Cameo and no matter which setting I use it is tearing in the corners.

I am treating my replacement ratchet blade with kid gloves. Bought Air Duster spray from £ shop and sprayed the blade before I started.

Did the card depth test and started test cutting using 'abcd' with the font Cambria Math. Blade setting 4 and used all different pressures, some with double cuts. Did not cut all the way through and little tears in the corners. Changed blade setting to 5 and repeated started at pressure 20 then up to 28. I can cut it with one cut at 28 but still the tears in the corners. The bottom and top of the letters a, b and d. I can see them before I unload the mat, little bits of white showing.

So not to waste card for the test cuts I am using small pieces of the the Centura pearl card I bought in a little box when I first started papercrafting. Think they are for ATC's, can't remember why I bought them, probably the price £1.