i use white vinegar with a bit of baking soda<
here is my recipe:
1/2 a cup white vegetable vinegar
2 tablespoons of baking soda
1 tablepoon water
this works great for me, vinegar disinfects, baking soda takes smells away and water thins it out
this is completely natural and wont hurt anything or any one!
after washing and scrubbing with the mixture just rinse out the rag and just wipe out with water
this is much safer then bleach
I use a 5 step process when I clean an incubator..
1) clean out all the loose gunk
2) wash with a mild dish detergent to get the rest of the gunk and then rinse
3) when it LOOKS clean I wash it again with vinegar and rinse
4) wash again with baking soda mixed with water and rinse
5) wash a final time with hydrogen peroxide and rinse, dry and then let air dry to remove any excess dampness
may sound like a lot of cleaning.. but this way i KNOW it's clean and no harsh chemicals that will harm the next batch of eggs have been used