How to replace the roller for rayson lm series laminator

while the laminator being improper used, the laminating film will be melt in the high temperature, it will make the rollers covered with glue, become uneven after cooling, then will be difficult to clean up; when the rollers reaches the end of the service life, the silicone will crack and blistering. when these situations occur, it will be no longer for laminating, the rollers must be replaced.