Tip #5: Don't Overlap or Pull Color Through the Mids and Ends of Your Hair
In a similar vein to root touch-ups, Schaudt suggests that anyone with preexisting highlights or dyes keep their DIY color concentrated in one area. "Don't overlap or pull any color through the mids or ends," she said. "This will create unwanted banding or cover any highlights you wish to keep." Although these issues are both fixable in the salon, they'll add time and money to your visit.
What to Try: Madison Reed Radiant Hair Color Kit ($27)