You can also use up the potatoes going green.
If you notice starch streaks forming, wipe them off. You may need to wipe more quickly to avoid leaving any streaks. You can also cut off dirtied slices or parts of the potato half and continue with the clean part.
While the potato film is drying, don’t touch it or you’ll leave fingerprints dirtying the window. Throw the used potato into the compost.
