Who me

I'll stick with Froff for now.
No, not used it. Mainly because I advertise "pure water technology" on my business cards and my commercial jobs have been told I only use pure water. Several customers ask me what's in my water and I go to great lengths to tell them that it's not what's in it - it's what I've taken out. So I'm rather reluctant to chuck something in the tank especially when I don't know what it is.
Speed doesn't necessarily interest me that much but when a brush/additive comes out that can whip snail trails off in one pass then my ears will prick up.
This time of year bird poo/snail trails/blood spots all tend to come off pretty quickly anyway so it's doubtful in my mind that anything apart from hot water would make much difference.
Who knows - I might try some one day.