First step is to scrub glass with toothpaste before each trip.
Then a 50/50 mix of baby shampoo and water.
I’ve never heard of using alcohol in the mask and it sounds like a really bad idea. If you don’t rinse it all out it’s going to sting and probably not good for the skirt either.
I’ve been using Loreal baby shampoo for about 20 years "because I’m worth it!"