Eh-- I've never had any issues with either my 2006 Olevia 537h, 2008 46pz800u or my 2011 50S30. I get that distilled water is safe but chances are if you need to CLEAN the display then water might not suffice as it won't cut grease/gunk. Personally, I would rather use a mild (MILD) detergent to weaken the dirt than scrub it off with a cloth regardless of how soft it is.
What to do if you find yourself stuck with no hope of rescue:
Consider yourself lucky that life has been good to you so far. Alternatively, if life hasn't been good to you so far, which given your present circumstances seems to be more likely, consider yourself lucky that it won't be troubling you much longer...
-- Excerpt from the Hitchhiker's Guide to the Galaxy.