I’m looking for the the ultimate tool for preventing birds from striking glass windows. The problem is compounded by glass windows on both sides of the house; birds see through the house and think they can fly through.
A cool tool is anything useful that is superior to comparable items. If you think this tool is inferior suggest a better one. You are welcome to insult a tool, but comments containing insults to individual people will be deleted. Corrections of fact are always welcomed, if stated politely. Recommendations of better tools are dearly wanted and may be elevated to the front page.