I'll be the odd duck out, sort of. Thirty five some years ago when I first got into airbrushing, I used Windex extensively for cleaning my AB. I had a Badger 200 brush. Over time, I began to notice that the chrome plating faded and it eventually disappeared. What was left behind is exposed brass. Then the brass began to corrode. For various reasons, I purchased another brush, and over time, the same thing happened. I could not figure out why this was happening, but I began to suspect it was the windex because the problem was exasperated when I left the brush in bath of windex. It wasn't until years later that I learned it is unsafe to use Windex.
Here is the difference though. I had a lot of problems with that brush and there were times it needed a good soak. Rather than use a lacquer, I used windex. I believe the damage was done by my soaking it. It is no myth that Windex will strip the chrome, I am a testament to that fact. I have seen it happen. However, I am not surprised to hear people using it and not having issues. Apparently, it is safe to blow Windex through as a cleaner. I would add that if you do, you should follow up with a good flushing of water.
I would believe what the other posters have advised. I am sure my problem is a result of soaking the brush in Windex for many hours. Having said that, because of my experience, I don't trust it, and I don't like using it. But that is just me being paranoid.