Ive been dying my hair for over 22 years now and for the last 16 because I went grey at 19, however can I buy something somewhere to strip it back to its normal colour grey n all! and start again? If so how much does it cost and where can I but it> If not how much does it cost at a salon to have it done? I dye it myself because I cant afford salon prices once a month, my hair despite being dyed once a month for 22 years is in excellent condition, thanks in advance