The blue gunk / glue is just to indicate to the manufacturer that the screw has been undone and therefore the warranty voided. So you don't need to replace that.
This site was excellent http://www.noboundrees.com/Micro_Fix/
Large photo's, simple explanation.
you WILL need a small tip soldering iron.
One thing, a tiny retaining clip fell out at one point (which was not mentioned) I don't know wehre it should have been refitted but nothing appears to be loose and everything works fine now.
Kev
August 2007