My understanding is they float them downstream using the main ocean currents and fish them out at the other end, they probably scotchguard them beforehand to protect them from the seawater which is apparently quite corrosive.
I can see how lucky you are comparing to us poor souls who has to face with this dreadful water restrictionBeeF said:As I have always suspected M6Gr8
I steer clear of high pressure washes as well, good ol Garden hose to loosen the dirt up and a Good Quality Lambswool Mitt with plenty 'o' suds does the trick