Hi, I've been using Schwartzkopf Bonacure moisture kick glycerol shampoo and conditioner from my hairdressers for my fine dry grey shoulder length hair (stopped colouring in lockdown). It's great but I ordered a bottle online today at around £20 after p and p and I can't sustain this long term. Any suggestions? I've been through a few high street brands but either still frizzy or lank.