I just bought a Cricut Expression and I am having a lot of trouble!! I bought cardstock to cut and it won’t cut through it! I have the blade on the highest setting and I have the unit on multi-cut 4 times, and it STILL won’t cut properly. Then, when I take the paper off of the cutting mat, it sticks to the mat so badly that the paper is ruined. Does anyone have this problem or know how to fix it? I am thinking of returning it immediately unless there are some tricks to using it that would help.