pm2: Mine is an 8 oz one from Wild Birds Unlimited. It's identical to humzinger in every way, even made for them by humzinger. They have a retail store near me and their feeder was a few $ cheaper than the brand name Humzinger. 8 oz is plenty for me because my birds will not allow more than one to feed at a time. I make nectar in larger portions and store in covered jar in the fridge. Only takes a minute for me to clean, refill, and rehang. Again, easy to clean and can even go into the dishwasher. I just use any old soap or spray cleaner. Someone above mentioned no soap but the manufacturer makes no such recommendation and I don't see how soap could be a problem as long as it's rinsed well. Karen Here is a link that might be useful: Wild Birds Unlimited

If you are boiling the water and changing the feeders every three days you are doing two things right. Mold will grow under most temperatures, but grow best with heat and moisture. If you have any significant mold spores either in the feeders or the jar you store the mixture in they will grow rapidly. Generally, using very hot water and soap works, as long as the feeders and jars are very dry before you add the sugar water. In your case I recommend using a mixture of bleach and soap to clean, making sure that you rinse off the feeders and jars very well afterwards because bleach tends to adhere to most surfaces. Also, make sure the feeders are completely dry before you add the sugar water. The one thing that mold loves is moisture. If the feeders and jars are dry you can be sure that there is very little mold. Feeders aren't expensive. I put out only two. I have four feeders, so the new ones I put out are completely dry. Let us know how things go and good luck.

I just read in Birds & Blooms magazine that hummers start feeding as early as 45 minutes before daybreak. So I watched the feeders and sure enough a male was feeding yesterday when it was just barely light enough to see him. Saw him again this evening when it was nearly dark. They are starting to fight over the feeders which always makes an intersting show!

Lovefornature-- I have two of the pp209 30oz glass feeders and I rarely fill them full . When you turn the feeder upside down the base fills and the glass level goes down. So when you see none or very little in the glass part the base is still full. The key for you should be the amount of useage and since you dont want to waste sugar water, if they are not using whats in the feeder in say 3 days, you should put less in. Only in past week have I been filling my big feeders full because they were draining them in a day when I only filled them half full, but that is changing now as migration is under way and many of my hummers have moved out and now there are just a few here, but I expect that to change from day to day as its not even august yet.