How long should I leave uneaten sugar water on the hive before it turns bad? I am using inverted quart jars on a walter t kelly hive top feeder. The feeder is placed on the inner cover, a jar is placed into one of the openings and then a empty deep is used to surround the entire thing. It is out of direct sunlight. I do not want to leave it on so long that it harms the bees but I also do not want to be wasteful.