I used not to clean them much, but my nests were gone some of them, half of the clutch or more, with clowns, dottys
Then I remembered something Brons told me once that he kept his tanks meticulosy or someting like that, clean, and at C-quest the brood stock person when not feeding will spend the day scrubbing and in the process since water was "free" doing water changes daily.
Some of my fish spawn when I am cleaning the tanks, those bite harder...
I dried my system , cleaned it, added new water, and now I scrub, feed one last time and siphon every day, my nests all go full term all eggs. and they look nice!
Ed