StepDoWhy
SteamHold the bowl over hot water a few secondsMoisture lets you buff off film without scrubbing
BuffLint-free microfiber or linen cloth, support the bowlStreak-free shine; twisting the stem snaps it
Prevent spotsFinal rinse in distilled water or a little white vinegarDissolves the hard-water minerals that streak
Cloudy vs etchedVinegar clears film; etching won'tFilm is removable mineral; etching is permanent