Here's a thought - my hose dry probably weighed 4kg or so,.. to get that amount of bubbles I'd imagine at least 3 or 4 grams of surfactant would be needed each day, and if its leaching out of my hose then my hose should be getting lighter right?
4 grams a day x 5 days a week = 20g
20g x 50 weeks (I'm a workaholic) = 1kg
so basically my 4 year old hose shouldn't be there at all,.. by now it should have all leached away?!
Take a couple of litres of pure and add the smallest drop of Fairy liquid into it that you possibly can. Shake. Be astounded by the amount of foam. And Fairy is only 10-15% detergent. You don't need anything near to 3-4 grams. Plus, it takes more than one day to build up enough to foam, so it's not five days a week. And a four year old hose (in my experience of what happens over a couple of years) would have stopped doing it.
I also included another test on the air front, which was that when I weas filling the bottle for yesterday's experiment, I had the filling tube under the surface of the water. No bubbles coming out, even though the pressure would have been released by then. As it should be in an experiment, I'm trying to disprove my thesis that it's surfactant rather than air.
But then I'm a retard, so what does the evidence matter...
Vin