Dual Pane Windows that leak humid air through the seals become ugly and must be replaced. Cleaning the glass between the panes is virtually impossible.  Glass companies throw away soiled “Insulated Glass Units” which end up in a land fill.  These waste “IGU” can be converted into valuable Solar Panels for heating water using heat from the sun.  Cottage Industry Solar has a training program and supply network to allow licensed individuals to convert wasted glass units into Solar panels in a garage, with no special tools or major investment.  Sell the Solar Panels for a profit or install them yourself for maximum income.  It is estimated 10,000,000 dual pane glass units a year are wasted in the USA, alone.... Let’s make thermal solar panels out of some of them!