Provide advice on how to accomplish the following goal. Give ONLY the advice, no other words or explanation.
For example:

Answer: <advice, as short as possible; a single sentence!>.

Goal: How to Clear the Opening on a Spray Can
remove the built up paint with warm water. Dampen a fresh rag with clean, warm water. Wipe the nozzle’s opening with the damp rag. Test the spray paint on a piece of scrap material
Turn can upside down and shake to evenly distribute paint. Tap bottom to remove excess.