Hi, Emilie. I typed a response to you once already, but it looks like the internet ate it. The Bosch ovens are at my station in the test kitchen, and I haven't noticed the light misbehaving; it's possible the contact on your switch is loose or corroded. But if you've seen any of my other responses, you know I'm not a fan of opening the door any more than absolutely necessary, and especially not for cookies, which have such a short bake time anyhow. You lose so much heat by opening the door, and in the end it creates a more uneven temp with a greater likelihood of missing the mark. Susan

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