I am just wondering what the temp should be in my incubator/s and where should this be measured. Both have fans and I have read that the temp should be around 37.5 celcius (99.5F) Also have read that a still air is different because of thermal layering, but after testing my incubators (hen egg- 24 and 48 desk top types) there is still thermal laying I guess just not to such a degree. Top of incubator reading is around 39- 39.5(102.2-103F). I recently put one incubator temp up because of slow/late hatching, but after I had about a 30% hatch rate this time I am thinking that I may have a 'lack of oxygen' problem with that one and not to do with the temp at all. (this one is a Rcom suro 24), as the other one that had my friends eggs in (and a few of mine) there was an 88% hatch rate. But I got a few chicks with bent toes/curled under feet! So when checking the temp should I be checking around the top/beside the egg level to make sure that is the 37.5(99.5F)?? I used a online C to F converter so sorry if they are out a bit!