Grease packs

They get spit out on the catwalk. Then they wait for one of your boots to come along so they can get a ride into the cab and make a big mess while your not looking.

 

Ive never used those grease packs. I picture them popping like a zit or ketchup pack on to the back of the sleeper. I like my method. Open both ends of a tube. Tap the grease out on both sides of the fifth wheel. Spread with a plastic drywall spatula. Drop suspension and back just under the trailer so I don't bulldoze the grease off. Reinflate and back the rest of the way.

 

The plastic ends up on the ocean

 

That's why when running in the sub-zero themps,I carry a oil can filled with used motor oil.
You can stay hooked up,drop your air and squirt it in.
Works real well..