How to get rid of chili-peppers on fingertips?
Capsaicin, the active compound in chillies, isn't soluble in water so it's hard to wash off. As a contact lens wearer you might prefer to wear disposable gloves to prepare them. It is soluble in fats so my wife's approach (she wears lenses, I don't) is to rub olive oil into her hands, then wash with soap and water. It seems effective, and we've seen it recommended online (maybe even here) but we only use fairly mild chillies.