WHAT ABOUT WASHING-UP LIQUID?

As an aside, we thought we’d give washing-up liquid a try to see how it fared. In its performance, reasonably well — it did a good job of preventing misting while remaining clear. However, it was a huge faff to apply it so that it didn’t interfere with my vision when misting wasn’t an issue - at speed, for example.

You also wouldn’t want to cart a bottle of it around with you if you’re on a long trip…