I should mention that I've never worked on a camera before but this one seemed simple enough that it would be a good place to start. It was suggested that I try placing a small drop of lighter fluid at the junction of the lense focus ring and the front of the lens body. I tried applying lighter fluid with a small paint brush to no avail. I've now been told that I should apply heat with a soldering iron.

Any thoughts or input before I take a soldering iron to a camera?