In the past I have printed on Oracal Oralite 5600 using my Roland RS-540 with great success, but recently the material seems to have some kind of residue on it that is causing problems. I have tried to wipe the material down but that is not always successful, and can be a real hassel with longer prints. I was wondering if any others have had this problem, or can give me your input an the reflective that you are using.