What are you finding is the best methood of feeding sugar syrup? I have tried the black plastic "tanks" that replace a frame and they seem to just fill up with dead bees. Its often too cold to use the front entrance feeders that use a quart jar with pin holes in the cover.The upside down pails seem to run right thru better than half the time. I have been using top feeder boxes but sometimes they leak thru or they fill up with dead bees or the bees just dont want to go into them. I need to get some more feeders just wondering what you guys are having success with.