@Foodpickle Will I ruin my non stick pan for omelettes if I cook fish in it?
No, not at all. Just wash it out..it'll be fine.
The only thing that will ruin a non-stick pan is using any metal utensil, or a metal scouring pad, on it. Stick to wood, nylon, or silicone spatulas, and you'll be fine!
Not if you don't scrape the bottom with the tines of a fork (which some people seem inclined to do).
It depends on the heat you are using. Non stick should not be heated over very high heat.
I wipe the pan with lemon juice on some kitchen paper and then rinse with cold water. It gets rid on any residual taste. You mustn't leave any residual lemon juice in the pan