2003 Toyota Prado Feul injector cleaning

Hi, my Prado is running fine and smooth with good feul economy however I was thinking to get my car's feul injector cleaning done along with spark plugs and feul filer changing as they are now due.

I am not sure if fuel injector cleaning should be done before i replace the old spark plugs and feul filters as all carob and resude will be captured in the old feul filter and plugs.

I think once feul injector is cleaned i shoudl then replace plugs and filter.

Please confirm the steps.

Thanks,

Samir
+966506472860
samirahmed@hotmail.com