Speaking of cleaning the Brinsea Octagon bators. If you have submerged the yellow bottom, you need to take it apart and clean the foam that is used as insulation. I figured this out after my last hatch. I knew water had gotten into the bottom so I took it apart and noticed rust and black spots on the foam. I soaked the foam in bleach water and then dried it really well then put it all back together again. The manual tells you not to submerge the bottom but I didn't read that part.