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Observatory question

Should I clean a stain before documenting it?

Document its shape, edge and context first because cleaning removes evidence about transport and recurrence.

?question

Document its shape, edge and context first because cleaning removes evidence about transport and recurrence.

Useful answer

Document its shape, edge and context first because cleaning removes evidence about transport and recurrence.

What to record

Write down the date, location, trigger and any change since the previous observation.

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