Questions about Kitchen Kashrut

Hello. I have several important questions: 1. Is it permissible to cook eggs in a utensil that is on the dairy side (but hasn't been used for dairy) and mix them with meat food? 2. I have two ovens, one for meat and one for dairy, stacked on top of each other. When one oven heats up, the other also gets warm. In the past, some meat sauce spilled at the bottom of the meat oven (which is below), does this prohibit the dairy oven? (We haven't used it for dairy for several months, only for pareve)? 3. I have an electric kettle on the counter next to the electric toaster. The toaster is used for making cheese. Sometimes the steam from the toaster touches the kettle. Does this make it dairy? It happened that boiling water from this kettle spilled on the meat counter. Does this prohibit it? 4. I cut kohlrabi with a dairy knife and then placed it in a container, which I don't remember if it's dairy or meat. But I put a bag at the bottom of the container, so the kohlrabi didn't touch the container itself. Does this prohibit the container? Does it have the status of "as cooked"? It's important to note that after this, I washed the container and placed it next to all the containers that look the same, so if it prohibits, do I need to throw everything away? Thank you very much!!!

Shalom and blessings 

1. I did not understand what 'a utensil on the dairy side, which hasn't been used for dairy' means. A utensil that has never been used to cook dairy food is pareve and can be used for anything. 

2. When the meat oven is below and sauce spills in it, there is no possibility for it to reach the dairy oven above. 

3. Steam rising from a toaster placed next to a kettle does not make the kettle dairy. 

Even if boiling water from a truly dairy kettle spills on a meat counter, it does not prohibit the meat counter.

4. The kohlrabi itself remains pareve and can be eaten with meat. And, of course, the container in which the pieces were placed is pareve.