The slide of the trombone is the most important, and the most easily damaged, part of the instrument. Its length makes it an east target for chairs, stands, and other instruments being carried hazardously. You must lubricate your slide every time you play, not only to ensure that it plays as well as it can, but to inspect it for damage before it gets bad. Please get in the habit of following this procedure whenever you play.

Locate a Bottle of Slide Oil (a) and a Shop Rag (b)
1.
Remove the outer slide section and use the rag to wipe off old oil and other buildup on the two inner slide arms with the shop rag. Inspect the finish of the inner slide section for corrosion and/or dents. If there is any serious damage you should schedule a repair as soon as possible.
2.
Place the outer section back onto the inner slide arms. Be careful! The outer slide section must go on straight to avoid bending the tubing. The water key on the outer section should be on the opposite arm of the slide lock on the inner section.
3.

4. With the slide fully extended, run a bead of oil dow both arms of the inner slide. Work the slide back and forth to ensure even coverage.