Hair was last dyed about 5 years ago, using revlon colorsilk 04, to which should have all been cut off and gone by now. Haven’t had it cut in about 1.5 yrs. Air dried 99% of the time, and only applied heat maybe once a year for a special occasion. Use basic shampoo, deep condition sometimes. Washed every 3-4 days. Non smoker. It is already cut and in 5 sections, I wanted what was left on my head to be even.