Funny you should say that, because I managed a water show in Macau. The 17 million liter, 10m deep pool had hydraulically actuated lifts in it, and we went from normal hydraulic fluid to vegetable oil for leak and contamination issues. The vegetable oil hydraulic fluid had issues, so we switched to a PEG-based fluid. Toxicity reports were great. I had over 400 technical dives in the pool servicing equipment. When we switched over, the performers were concerned about the PEG-based fluid. Some claimed they had a rash after a small leak (5 gallons in a 5m gallon pool). Others joined in on the fear and I had to address the technicalities to a mostly lay audience. I asked them to check their body moisturizers and hair conditioners they all used before and after each show. One of the top half of the ingredients were PEGs. I am not saying someone couldn't have a sensitivity to PEGs, but in this case it seemed like fear over rationality when they were putting more ppm of PEG on their bodies via their care products than they could have been exposed to in the pool.