dishwashing liquid soap safe for cleaning optics?

Started Jun 16, 2012 | Discussions thread
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EOS_GUY
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dishwashing liquid soap safe for cleaning optics?
Jun 16, 2012

Yesterday I accidentally touch the rear optics of my 85mm 1.2L, first I tried to wipe it using pecpad lens tissue with distilled water but still it smudges, second I tried isoprophyl alcohol but still I can see marks then lastly I tried water with a little of dishwashing liquid soap and viola no more marks, crystal clear! Is it safe to use dishwashing liquid soap in cleaning lenses?

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