If I were you I would fully take it apart, and clean with cleaning tools all the holes the needle goes through, and also using toothpick and airbrush cleaner liquid (wearing mask and gloves) go through all those holes that the needle goes through. Also add a little of that lubricant into the trigger area as suggested.
Having said all that, it also depends on the age of the airbrush. I had an iwata eclicpse you have from 2016 until 2024. Over time it degraded in performance, which could be revived by proper cleaning but I found that the airbrush would still suffer in performance, and it would also degrade faster and faster. I had that airbrush stolen, and bought identical one again. It just works so well now I figure the issue for me was really old needle, old parts overall that are worn out. So consider replacing some parts like the needle or the copper tip at least to see if it helps.
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