Why does AI add things I didn't ask for?

Image models learn from very large collections of pictures, so a "kitchen" arrives with typical kitchen objects and a "poster" often arrives with lettering. The less you specify, the more the model supplies from those patterns.

Describing what you do want is usually more reliable than listing what you don't: "an empty white counter" gives a clearer target than "no clutter". Where something specific must not appear, say so plainly in the same request, and keep busy scenes simpler, since crowded scenes give more room for stray objects.

If one unwanted object appears in an otherwise good image, edit rather than regenerate: ask for that object to be removed and say what to keep.

In ImageQuarry you can make that removal as a plain-language request on the version you like, and the cleaned image is kept as a new version alongside the original.