“I have seen the goodish, baddish and definitely the most frightening!”

Frank Friscioni, master color designer atOon Arvelo Salon, tellsThe List.

The mistake he sees most often?

Hair dye

Not investing in thebest hair dyefor your hair.

More DIY hair coloring mistakes

Another big mistake is not following the instructions on the pack.

Although it may seem obvious, it’s something people seem to relax about when they shouldn’t.

Hair dye

Instead, “always apply the box color to the roots to avoid overlapping.”

He also advises taking your time to apply the dye to your hair in sections.

Lastly, if you have gray hair, the biggest mistake is often slightly different.

And it all comes down to not leaving the dye on for long enough.

“Most box color formulas have limited coverage,” Friscioni points out.

“I would recommend an extra 10 minutes more for gray coverage.”