I swap the front or rear syrup pan every day with a clean pan. The pan I pull off I add a couple gallon of vinegar and about 6 to 7 gallon of water to it and soak it overnight. Like a new pan the next day and I keep reusing the vinegar and water mixture all season. Cross flow pans sure make life a lot easier keeping the pans clean.
The pan that had the vinegar in it I rinse out real good for about 30 seconds with a water hose.