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It did work perfectly for the first 18 days, but the space heater developed a problem after that; it would randomly shut off on its own at irregular intervals, say, once every 4 hours, then again after 5 hours, or something like that. I had been checking the eggs every hour or two anyway, so whenever that happened I caught it quick enough to be able to fix it and the temp never dropped low enough before I was able to heat it back up again. I wasn’t gonna risk it happening again during a time I wouldn’t be able to fix it fast enough, say overnight for example. So for the final 3 days of incubation (lockdown) I made a new/different type of incubator, this time combining one someone bought for me that read 40°C, but only actually got to around 34°C, so I used a red heat bulb (I think it was 150/175 watt) underneath it to get the temp up to 37.5°/38°. It had a lid and holes in the bottom area so I could add water with a syringe for humidity without having to open the lid. This worked with no problems, drew way less power than the space heater did, and I only checked it a few times per day to add water. I also remember with the space heater method the temperature inside the basket would fluctuate slightly (only by maybe 1°C, 2°C max) likely because of it being in the basement and the air temperature down there also regularly changing. I would have to move the heater forward or backward an inch or 2 to either heat up or cool the incubator slightly, then check again 20-30 mins later to make sure it worked. So the bulb method is probably better in almost every way, and could’ve been used for the first 18 days as well.