Not sure I'll continue to use as well. It's a great product as far as performance goes but the possible side effects may not be worth the risks. It is nice cruising on the highway in a raging rain storm and passing other people without using your wipers and not really needing them anyway!
There is another product that we use now it's called Aquapel. Nasty if you breathe it in but it works a LOT longer than RainX. I treated my car about 19 months ago and it's just worn off now. No way you will get it sprayed anywhere because you pinch a tube and wipe it on your windshield. It's got to be very clean tho. Also you can't use your wipers for 48 hours or so, so that it will have time to cure. They don't tell you that on the package but it's true. More expensive but works great. We have enough to do our front windshield and rear window in one tube. It will not work on a snowblower tho.
"If you have more miles on your snow blower than your car, you live in New England." "If you can drive 75 mph through 2 feet of snow during a raging blizzard without flinching, you live in New England."