The ordinary exit can be dry-cleansed under its special allowance. If impurity reaches surrounding skin beyond that region, the excess must be evaluated under broader rules for removing bodily filth.
A limited trace at the exit and impurity spread onto adjacent areas are therefore two different cases.
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Istinja: Methods, Preference and Juristic Differences
The ordinary exit can be dry-cleansed under its special allowance. If impurity reaches surrounding skin beyond that region, the excess must be evaluated under broader rules for removing bodily filth.
A limited trace at the exit and impurity spread onto adjacent areas are therefore two different cases.