My history is that of many making their own incubator, however I found heating and keeping heat fairly easy, it was the humidity that has me scratching my head. i think it's because the wood soaks up water like a sponge despite it being lined. The humidity in the house is only 35% before I add heat, no heat and the incubator has 50-55% and within an hour of turning it on the levels drops to below 25% I have the whole bottom area filled with water, i was going to add sponges and decided there must be a better way. Here you can see the bator and it's set up, The heating duty is done my an 85W heating element, i have 2 and got them in a box of junk at an auction for $2. The thermostat was aded as the dimmer did not take into account when the room heated up and cooled down giving huge temp swings. the huge fan did nothing but make the temperatures unstable and so i decided that can go and circulate air around the brooder. I was hanging up the laundry and thought what a good idea, the tray would act as a washing line and an old towel cut into strips would act as washing. Eureka! i call it the laundry humidifing method as apposed to the sponge. So Far I have humidity levels at a steady 45% and temps between 99.5-100.2 i will add a couple of dishes on the turning platform with sponges to increase the humidity from day 18 but for the first 18 days I'm good to go. The sad part is I am buying chicks this year and still have to build the coop, i just dug out where the foundation was started last year, still need a bit more thawing before I can continue.