Along with the lighter fluid, get yourself a can of compressed air to blow the excess fluid out of the shutter.
Once you have the lenses out, put a liberal amount of fluid on a Q-Tip and dab it onto the shutter blades. Cock and fire the shutter numerous times to work the fluid in. Take the air and blow around the perimeter of the shutter away from the center of the shutter. Then let it sit for a day or two to evaporate the rest out. Test the shutter every so often during the evaporating time. When you first spray the stuff in the shutter typically works immediately, but may freeze back up as it dries, so use more fluid if it does. You may have to repeat the process a few times before it stays operational. The air blow is an important part of the process as it tends to blow debris away along with the fluid.
After you are satisfied that you have a good shutter, you will have to clean the front of the rear lens element of lighter fluid residue. Just set the shutter to "B" and clean the lens with a puff of your breath and a CLEAN Q-Tip. You may have to do this a few times as well until it looks good. Use a new Q-Tip each time you clean a lens. Then carefully clean the front lens before you reinstall it.
Hope this helps...