My solution to cleaning home made DIY solar thermal collectors of a parabolic design similar to mine at:
http://georgesworkshop.blogspot.ca/2012/08/diy-solar-parabolic-trough-20-intro.html
Uploaded from my iPhone 4S
Main website http://www.ffwdm.com/solar/solar-index.htm
Thank you for your interest in my work and for your support.
George
