Has anyone experienced frozen grippers on the transfer gripper bar just before the coater and the coater impression cylinder itself? If so how did you correct the problem and prevent it from happening again. My solution is to loosen each gripper and slide it to one side to clean the shaft of what looks like built-up coating. simply working the grippers back and forth with applied solvents does not loosen them. I tried a variety of solutions like penetrating oils, ammonia, anilox roller cleaner, and even isopropanol. a heat gun loosened the gripper just fine but when it cooled it just froze up again. it takes almost 8 full hours to clean up 4 bars and it only lasts about 6 months before having to repeat the process. needless to say, this is a very annoying problem that I always seem to get stuck with. Any help would be greatly appreciated.