I have some eggs hatching today in the incubator. How do you mark your pullets/roos so you know which is which in a few weeks?
I use a sharpie, and if they have white bellies like the OE and FBCM, I color the bellies green/blue/brown whatever so I can remember what color of eggs they came out of. I used to color the legs and toes but it comes off really fast. The bellies stay stained for quite a while. As they grow, I have leg bands to put on them, ones that fit around 4 weeks and then LF size. They have numbers on them so I can record who is who...
How does everyone clean the inside of your incubator? Have you purchased any of the disinfectants? Any homemade options?
I use oxine. If you don't have oxine, water with some bleach in it works just fine, spray it down, rinse, and let air dry

What kind are you hatching?