Sulphuric acid
I have used windex on Hbirds with no issues.
Windex is fine, just make sure it’s the multi surface (vinegar) or crystal rain variety… Both are ammonia free. Regular Windex contains ammonia which can and will ruin LCD screens. I’m not saying it will ruin it immediately, but over time will cause damage.
I use 50/50 vinegar and distilled water mix to wipe down screens, motor, and hull. It’s simple, works great, won’t ruin anything, and dirt cheap. Why use anything else?