Hi everyone, quick question - I am currently growing my roots out to go from hi lift blonde to foil highlights.it's been over 3 months and I plan on growing them at least 1-2 more. I realised I don't really like having a lot of dark root. So how often do you normally do a root touch up on full head highlights?would every 3 months be too early/damaging? I recall a stylist saying she would do them only like 3 times a year. Thanks in advance!