After many years of exposure to "brake clean" I have become allergic to it. Carb cleaners seem to be OK, but brake cleaners will have an effect on me within minutes of slowed ability to think through problems and a lack of concentration. In short, ANY exposure, even being in a shop where a couple squirts are sprayed and I just get a whiff of it, has the effect of about 4-5 beers. Sounds good, huh? It's not. Especially when driving and not being able to concentrate. It can last anywhere from a few hours to days depending on the amount of exposure.
I recommend that you use as little brake cleaning fluids as possible.