aquaticbiology said:
Windex has ammonia among other strong irritants - hmmm. Jelly stings are almost electrical in nature (chemically induced and injected via dart and pipe) so maybe the ammonia is blocking the chemical stimuli - wouldn't do much for the irritation though, still have lots of darts and pipes in there. Tomato juice, paste or salsa contains acidic enzymes that dissolve the darts and pipes. I suppose it is theoretically possible that the solvents in Windex would cause them to dissolve. Check the label for broken skin warnings.
Interesting. I thought at one time, Windex had two products, one featuring Ammonia, and one without. I have pulled my bottle of Windex "Origianal" and it has Ammonia - D. The warning label is hidden on the back of the front label so I have to remove the sticker off of the back of the bottle and read through the blue and weed out the front label peaking through in order to read it.
No warning about keeping it off your body, but they do give a question, comments number 1800-558-5252.
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From the Dept of Natural Resources website regarding jellyfish stings:
Treatment of Sting
"Primary first aid for any jellyfish sting should be to minimize the number of nematocysts discharging into the skin and to reduce the harmful effects of the venom. If stung by a jellyfish, the victim should carefully remove the tentacles that adhere to the skin by using sand, clothing, towels, seaweed or other available materials. As long as tentacles remain on the skin, they will continue to discharge venom.
A variety of substances have been used to reduce the effects of jellyfish stings. Meat tenderizer, sugar, vinegar, plant juices and sodium bicarbonate have all been used with varying degrees of success. Methylated spirits and other forms of alcohol formerly recommended for inhibiting stinging cells actually stimulate them and may increase pain and cause severe skin reactions. Picric acid and human urine also cause a discharge of nematocysts and should not be used. Victims of serious stings should make every effort to get out of the water as soon as possible to avoid drowning. If swelling and pain from more serious stings persists, prompt medical attention should be sought. Recovery periods can vary from several minutes to several weeks."
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When I read about the Windex, all I could think about was the father in "My Big Fat Greek Wedding." If you saw the movie, you know what I am talking about. If you didn't see that movie, you missed one of the funniest movies ever made.
I had almost forgotten about that movie..wasn't it hilarious?! Funny how I could relate to so much of it....my own parents immigrated from Austria back in the 50's, and so much in that movie hit home with me! 
