Pilsa Diet Before applying the oil to make sure your eyes should be properly cleaned and free of makeup. Apply the oil gently by using a brush and leave it for the whole night. Wash it off next day with water or with a makeup remover. The oil is applied at night because the contact time would be more and cells are hydrated properly, and excellent results can be achieved in this way.It takes a lot of training, skill and practise for a beauty technician to produce the best results, as applying permanent and semi-permanent cosmetics is a highly skilled craft. Everyone has unique facial features, face structure and skin tone, which can influence the treatment in different ways.