At a loss. Help

10 year old Clack water softer stopped working. Noticed low pressure in the house and hard water stains in our shower. Watched Gary the Water guy on YouTube and checked for salt bridge by cleaning out the brine tank completely. Replaced the injector valve and seal. Replaced the brine tank connector as I've heard those can leak and lose suction. Cleaned the end of the float free from and debris. I had 1 random successful brine draw (DN) phase where it got completely absorbed (with ResClean). Only thing I haven't done is a resin exchange but have read using resclean can help but I can't get suction or pressure to get the brine to be absorbed. Any advice???