I got my hair extensions done at quite an expensive salon in New York, near to my sisterâs home, but it stayed for just two months. My hair now look more frizzy than ever before, and I am not in favor of treating my hair again for a shine, that would last no longer than 2 months. I just wanted to know from some hair expert whether if using the formula for hair extensions is similar in all the salons, or does it vary! A friend of mine asked me whether I got a haircut done after the extension, and I didnât! I want to know whether it is a mandate to get a haircut done after hair extensions, and that the salon charges it exclusive of the hair extension services! Please advice aptly! Thanks.