A standard Acorn(Logitec) mouse off of a A30x0 series computer.
There's nothing worse than using a filthy "rodent"
View of the underside, this is where most of the grime gets attatched.
First remove the "ball" by gripping the lock-ring and turning it left or sometimes right.
Next remove the 2 securing screws.
Lift the lid upwards from the "screw" end and unhook it at the other.
This will reveal the components and probably years of filth.
The components are easily removed, they just lift out. Dust everything and get all the grime
off of the 2 encoder rollers. This is the biggest cause of mouse problems.
The mouse re-assembled after being dusted and wiped with a damp cloth.
It looks 110% better now.