Large zip lock bag
Simmer 2 cups of water in a pot. Just as the little bubbles begin to be removed from heat. Not boiling
Put a large ziplock bag on a towel. With another person holding the bag open, Carefully Pour water into a large ziplock bag..zip bag shut. Carefully scoop up the ziplock with a towel. Never touching the bottom of the ziplock. Set ziplock onto both bypass knobs. Wait for about 5 minutes or until the ice has melted. Turn bypass.
Do not force bypass knobs as serious damage can occur.
Depending on how much ice is covering bypass knobs length of time may vary.
"The Clean Water Lady"