I bought a 48 egg incubator on eBay a long time ago. It appears to be from China because there is no brand name and the instruction manual is obviously translated. I have used it last spring for two hatches and they both failed. This year I am trying to hatch successfully. I bought a good incubator thermometer and compared it with my incubator that showed to be 7 degrees too cold. I calibrated the incubator to -7.0 according to the display, and now it matches with my thermometer. The incubator has been heating for 24 hours now and the highest it has gotten is 97 degrees fahrenheit. I can no longer return this or contact eBay, the window has expired. Any ideas on how to make it get hotter? Insulation might work, but I don't want to prevent ventilation. And it is plastic, so a heat lamp might melt it. Any ideas appreciated!