Here's a recipe for ya. I'm told it works.

You will need:

• One full can of regular pop (any kind-no diet soda)
• One full can of beer (no light beer) 12oz
• 1/2 Cup of Liquid dishwashing soap (do NOT use anti-bacterial dishwashing liquid)
• 1/2 Cup of household ammonia
• 1/2 Cup of mouthwash (any brand)

Directions:

• Pour into 10-gallon hose-end sprayer (other sizes will work too)
• In high heat, apply every three weeks