Heater Cable Lubrication?

There's a few methods.

You can cut the corner off a ziplock bag and rubber band it to the end of the cable to make a little funnel. Then fill it up with cable lube and just work the cable back and forth until it comes out the other end.

They sell cable lubers for dirt bike cables. I imagine they'd work for heater cables as well. You put it on and just spray lube into it and it comes out the other end.

There's another method that I can't remember exactly. I believe you put a piece of hose over the end of the heater cable and use a hose clamp to clamp it down. Then fill it with lube, place an air nozzle in there, cover up around the nozzle so nothing comes flying back out and just blow it through the cable.