Hello chicken folks, I need help! I am about to purchase my third waterer because of overflow. I am reluctant to use a nipple water system because the waterer is outside and we are in Michigan, where it can get really cold. When I started my flock in January, I bought this waterer (Farm-Tuff Top-fill, 5 gallon) and it never worked. It overflowed no matter how I adjusted it. I Googled the model and found nothing but similar complaints, so I returned it. Then I got this model (Harris Farms Easy-Fill 5 gallon) and it worked. At $40, it should. I liked it a lot, it was easy to fill and clean. For a few months anyway. Then it started to overflow for no apparent reason. I Googled this one and found an instructional video that someone posted here about disassembling and cleaning it. Which I did. It didn't really change anything. The cup still fills too much, but it was ok for a short time, barely containing the water. Well this morning I found an empty drinker and a muddy pen AGAIN. ARGH. It is on a perfectly level surface. I need to get a heater unit anyway, so was thinking of buying or making a heated base for it, but now that it is overflowing, I need another solution. Does anyone have one of these? I can't find any adjustments. I just want a reliable waterer! How are these metal drinkers? Thoughts? Thank you for any help!!!!!