Not at all! It’s totally optional. We developed The Shower Cap to make it possible to store A2TC in the shower. We know that for some people, being able to wash their face in the shower is a must, and we want to make life easier for those folks.
However, there is still a good reason to use A2TC at the sink instead. Facial skin is like a sponge, and while hot water can open your pores for easier exfoliation, it can also drain your skin of its precious natural oils, leaving it dry. Whether in the shower or out, we recommend washing your face with cool or lukewarm water, using as little water as possible to get the job done.