I decided after reading all these great tips,I would take the cables off.That would make the application,like you recommended so much easier and less of a mess.I hung and clamped them off by bench.I put two small containers under the ends to catch the drips.I just gave them a squirt, every time I walked by.Working great,and I didn't break the knob off.Thanks again guys,really appreciate all the help.I find that its the application method as much as the chemical used. I use a syringe (without the needle) to inject oil/WD40/PB Blaster etc into the cable casing. The syringe helps to control and pinpoint the the flow. This method has worked for me on all my farm/lawn equipment including my Harley. Not to mention, the clean up is minimal.
Just another opinion and perspective of what works for me.