An ounce of prevention is worth a pound of cure.
Speaking for experience...everytime I have take the short cut when dealing with cleaning my airbrushes it has come back to bite me time and time again.
There's never enough time to do it right the first time, but always enough to do it again.
When I am in a spraying session...that is paint several parts or assemblies using different colors, I will flush between colors and occasionally pull the needle to give it a quick wipe. Once done, that is I will be not returning to the paint booth for several hours or days, I quickly tear down the brush and wipe the components off/out with lacquer thinner. I have the tools handy to make the project go fast and easy.
If I really don't have the time to do it, I at least have learned to pull the needle and wipe it off after first flushing the brush with my cleaner of choice.
Pushing more pressure through the airbrush with thinner doesn't necessarily mean it will clean better...the thinner doesn't have as much time to loosen the paint residue if you are pumping it through faster and with more umph.