Hair tint usually looks patchy because of uneven application, poor saturation, product buildup, uneven porosity, old color, missed sections, incorrect timing, or choosing a shade that does not match your starting hair color. To fix it, let the hair dry, check it in natural light, identify the patchy areas, touch up only missed spots, use a deeper gloss or color-depositing conditioner for mild unevenness, and see a stylist for severe patchiness, hot roots, green tones, or damage.