What is the ruling on washing a piece of skin (*jildah*) that detaches from an area not designated for obligatory washing during ablution (*wudu*) but hangs down into the designated area?

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If a piece of skin detaches from a location other than the obligatory washing area but hangs down into the obligatory area, it is obligatory to wash it. This is because its origin is within the obligatory area, making it analogous to an extra finger. The ruling is mandatory.