Not sure where to post this question, but here goes.
My FOC retail Bruticus, specifically Blast-Off, has been suffering from a squeeky loose joint in his combiner connector piece. All my other figures are fine and 'racthet-y', but Blast-Off is the odd man out.
Any advice on how to correct this? Is it even possible to correct this issue? Any remedies involving floor wax? I have tried to disassemble the joint, to no avail

I am in no way a customizer and have little to no experience fixing figures. Detailed instructions will help tremendously and be greatly appreciated.
Thanks for the help.