I saw a clip advertising Lumberjack adhesive on the web and bought a tube on Amazon. My daughter had a very noisy staircase. Normally you could glue and screw from the back but this was closed off in the hallway. I used Lumberjack and screws from the top and found the squeaks were 90% gone. However the adhesive hardened and slightly expanded over the next 48 hours and all the offeding squeaks have gone thanks to Lumberjack - GET SOME!
PeterEverbuild 30MINPU3 Lumberjack 30min Polyure Wood Adhesive Gel 310 ml