How do you say in Spanish "clean the light switches as needed?"

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How would I ask someone to " clean the light switches as needed"?

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updated JUL 22, 2011
edited by --Mariana--
posted by kQQkky

1 Answer

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Limpiar los interruptores de la luz según sea necesario

updated JUL 22, 2011
posted by shademan64
" según sea necesario" would one use that also for "Coloque las lágrimas artificiales según sea necesario."??