A couple of years ago I bought a used incubator from goodwill. It doesn't have a label anywhere to tell me who made it. The only label I found was on a removable thermometer inside the incubator. It says G.Q.F. MFG. CO....No. 1850. I have never used an incubator before, and want to hatch some fertile eggs in a month or two. I don't even know what might be missing from this incubator, how to use it, nothing. I don't even know if it works, or how to check to see if it works. Could someone please help?? Thank you!