I'm sure you're wondering how to get rid of mold in shower with vinegar. Just use the basic and regular white distilled vinegar, generally with a 5% level of acidity, and it works best undiluted. So do not stress over mixing it with water first. However, due to the fact that it is a mild acid, avoid using vinegar on aluminium, waxed wood, natural stone, and cast iron, as it may cause damage to etching in the finish.