I know that the Rolls RB211-524G/H controls on the 767 and 747-400 were very sensitive to fine particle contamination.
and so are most of the new FADEC controlled engines on all model types.
It's the fuel metering concept that requires close clearances, not-too-tight and not-too-loose, just like a musical valve instrument.
Please don't open one up when not in a clean room.
Screens are fine, except when the contamination is created from a dissolved substances into a particle after it passes through the screen.
Nothing left but trust in the fuel as well as the crew.