Originally Posted by dealer6871
Never heard of RODI water, but looked it up. One quote is:
"Due to its fine membrane construction, reverse osmosis not only removes harmful contaminants that may be present in the water, it also strips many of the good, healthy minerals from the water as well, thereby making the water. Reverse Osmosis water is, in fact, so chemically unstable and acidic that in many countries national plumbing codes restrict water that has been filtered via reverse osmosis from being reintroduced into copper pipes due to its corrosiveness on the copper. This also has implications for reverse osmosis filtration systems that use steel storage tanks, as the acidity of the water can lead to the steel rusting over time and contaminating the post-filter water."
Perhaps the water reacted with the warm panel and left some chemical residue already on the panel. I normally use distilled water on my cool Kuro panel and have had no problems. I would try again on a cool panel with distilled.
I'm not sure where you read that, but RO/DI water is not chemically unstable and it is not acidic. It has a PH of 7 (neutral). However, because of its purity, it readily absorbs gases like CO2, which can
affect its ph. The same would be true of pure lab grade distilled water, which is even more pure than RO.
I think what people are actually refering to is water's properties as a "universal solvent". Water can absorb anything on the periodic table. even if it's only a few atoms. In practice, it is possible that highly purified water can damage a chemical coating, but it is highly unlikely if all you do is clean with it. More than likely, the damage in this case was due to the panel being warm and too much elbow grease and ironically. not enough
water while cleaning. the result was an abasive effect on the coating, which is probably only a few molecules thick. I've seen a similar thing happen when people tried to clean the lenses on their RPTVs.
Unfortunately, I did some research but was unable to find a fix, other than a cosmetic one already mentioned. Back in the day, it was a matter of getting replacement lenses, but replacing a panel is a much bigger deal I imagine.