Melted transparency in lexmark mx511? Any way to remove clean fuser?

SOURCE: replacing fuser roll in hp4200n

The line is most likely debre on the fuser assembly itself. depending on the amount of material on the unit, it can be cleaned of ispropal alcohol. First unplug the unit from the wall. allow the unit to cool down for several hours. The fuser can be removed opening the back access cover and removing it by pressing hte hing release on the inside. Id your unit has a duplexor it will be need to be removed first. lift up on the unit and pull out.
The fuser has two screws. remove these screws and slide the fuser out the back of the printer.
At this point you can determin if the fuser simply needs cleanded or should be replaced all togeter.
with a clean cloth dampened with 99% isopropal, you can try to clean the rollers inside the fuser.

SOURCE: My wife tried to print on T-Shirt tranfers meant

This might help. I did the same thing with my laserjet printer.
Staples has laserjet cleaning sheets. I ran several sheets through the printer after I pulled most of the transfer paper out.
The sheets are one use sheets so, you will need a few.They are impregnated with cleaning fluid on textured paper.
These sheets clean the entire paper travel path.

SOURCE: transparency melted onto IN1503 lens

try peeling what you can off and then go to an electronics store like radio shack and get some aerosol board cleaner like BIO-ACT E37M which is a cleaner good at dissolving or breaking down plastic or FLUXOFF board cleaner and work at cleaning it off with a non abrasive cloth and scraping off with something plastic like a credit card and keep working at it until it is mostly clean and maybe a little hazy looking and then get a new cloth and start cleaning the left over residue off the lens with alcohol until it is clean.