What happens if you don't wash out semi permanent dye out properly?

If you don't wash out semi-permanent dye properly, it can lead to several issues. Residual dye may cause the hair to feel sticky or greasy, and it can also lead to color transfer onto clothing or skin. Additionally, improper rinsing can result in uneven color or fading, as the dye may not set correctly in the hair. Ultimately, this can affect the overall appearance and longevity of the color.