I have heard the leather wipe for the dipstick, and think you could probably wipe it with sandpaper and be fine.

The inside of the transmission is extremely sensitive to contaminants, which is why rebuilding and even changing the filter must be done with extreme car and using lint-free cloths is how most of us work.

The dipstick however, is upstream of the filter, and a too-small-to-see piece of lint will not get past the filter, and won't block enough filter area to make a difference. Take reasonable care to keep it clean and use clean cloth to wipe it.

Just my opinion, not trying to start anything, ... if I was I'd say something about synthetic oil. ;~)

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Gone to the dark side

- Jeff