A sample procedure is explained in the Bottom Wiping post.
First, fetch a tissue, it might be a dry one, or a wet wipe, or a thick paper tissue with a squirt of lotion in it. For increased sensations from wet wipes, try putting them in the fridge first.
Perhaps the act of wiping is as simple as circling the subject’s bottom hole until it is clean and smelling fresh.
But experienced disciplinarians know that excited young ladies require more thorough wipings, as their bottoms can become messy and sticky by what leaks from their slits.
Hence it is not uncommon for a girl who is due to be spanked, to first need to be cleaned, when her panties are lowered and the creamy mess of her anticipation is revealed.
In this case, after fully removing her soiled underwear, her disciplinarian would wrap a clean tissue around their fingers, then reach between her thighs until the tissue was resting against her smooth bare mound.
They would begin to slide the tissue backwards, following the swollen folds of her slit. Its passage lubricated by her own excitement. Her arousal is obvious, but quite natural, as all girls glisten before their bottoms are smacked.
They would feel her warm dampness as their fingertips pass over her vagina, pausing and lingering, then rubbing in subtle circles to soak up her stickiness. Before letting the moist tissue slip easily down to her bottom hole, circling it several times, enough to collect any incriminating evidence. Woe betide a girl who reported for a caning with a dirty bottom.
Finally, pressing firmly, they would let the tissue glide upwards between the fissure of her buttocks, whereupon her mess would be thoroughly examined.
I do hope that answers your question.