It does almost what it promises for the first few minutes. After that, it's like it doesn't exist. Both on the helmet and on the windshield of the motorcycle, visibility is slightly better in the first few minutes of rain, but that's it.

I don't know if you want to use half the bottle or apply it every day, but for me it did nothing, the drops stay on just as they did before. If I manage to do something, I will update the review.