Eva, I let my hair grow out. it was one of the first cost saving measures made, I had to get it cut every 4-6 weeks it grows so fast
I felt happier with my hair once the fringe was grown out, I was beyond bothering to cut it monthly. I have had foils put in 6 - 12 months ago & I use either of 2 shampoos by Redkin, 1 it puts a slight hint of pink in amongst the hair by picking up on the previous foils and prevents the dreaded skunk line regrowth. It gives a hint of pink & looks like it's been done professionally. The other is purple colour that picks up the platinum highlights and really makes them pop (silver /white gleam) - looks as though I've just come from the hairdresser. I did this for 12 months, had my hair cut, styled & foiled. My hairdresser was so impressed she's sticking & selling both products now. .... I don't use it every wash, just once a month and I alternate. Plus with my hair longer I only need to wash it once a week - what a luxury from short hair daily washing.