Does a small recurring corner mean a small confirmed scope?
Its visible size does not establish hidden condition or the source. Explain recurrence and discuss appropriate assessment.
Should I compare it with another clean corner?
Keep the affected position and its changes identifiable. An unrelated surface cannot settle the original concern’s material or moisture condition.
Can furniture proximity prove why it grew?
It is useful context, not a complete diagnosis. Describe the normal arrangement and observations without assigning a source from location alone.
What if the mark moved after earlier work?
Describe both positions and their timing. Do not assume every later patch has the same explanation.
Should I request exactly the previous treatment?
Explain the current recurrence first. Findings may support another next step, further investigation or a revised scope.
Can ordinary visits guarantee the corner stays clear?
Routine cleaning has another purpose. Suitable mould treatment and moisture work need their own enquiry without a prevention guarantee.