Is it supposed to be washed out, or can I leave it in on dry ends? — MIRROLLA BURCH OIL WITH NETTLE EXTRACT 99ML (repeinoe maslo+krapiva)

No — this is designed as a pre-wash treatment, not a leave-in conditioner. The instructions for this type of product are clear: apply it before shampooing, leave it on for a while, and then wash it out thoroughly. The oil works by forming a light protective layer on the hair shaft while you wash, reducing the drying effect of the shampoo and smoothing the cuticle.

If you leave the full amount in your hair, the result will usually be a heavy, oily look, especially on fine or straight hair. On thick or curly hair, a tiny drop applied to dry ends after washing can be tolerated by some people, but that is a personal experiment, not the stated use. The intended routine is rinsing it out, and washing is what removes excess oil that would otherwise attract dust and make the hair look greasy.

If you are looking for a leave-in product, choose one that is explicitly made for that purpose — those formulas contain lighter ingredients that behave differently from a pure plant oil base. For this oil, stick to the pre-wash ritual: dry hair, a short or longer pause, then thorough shampoo. If you accidentally skip the shampoo and leave the oil in, expect the hair to look shiny but also flat and oily the next day.